Compare Tokyo, Lagos, Dhaka and London fairly. The 300 largest urban areas in the world, all measured the same way from EU satellite data (GHSL Degree of Urbanisation). 300 urban areas: population 2025 and 2000, growth, area, density, built-up share, greenness, elevation, distance to a major port and airport, mean temperature and rainfall, other places in the same urban area 10 ready lessons with worked answers: megacities then and now, growth (median, IQR, fastest and slowest), box plots by continent, density, Spearman’s rank (density vs green space), PMCC and regression (size vs area), coastal cities, climate and heat, mapping, own investigation 3 charts (PNG): world map, top 15, growth box plots. Excel workbook, works in Google Sheets. For GCSE, A-level and IB Geography urbanisation units, and statistics practice. Quality check: two areas whose 2000-2025 growth was over 400% (Luanda, Luxor) were removed as likely source-data errors. Pairs with the World Countries Large Data Set and the Global Migration & Refugees Data Pack: search LilambdCrossing on Tes. Data: EU JRC Global Human Settlement Layer, GHS-POP / GHS-SMOD / GHS-BUILT-S R2023A and built greenness R2025A (CC BY 4.0); city names and points from Overture Maps / OpenStreetMap (ODbL 1.0, © OpenStreetMap contributors); elevation from Mapzen terrain tiles, ports from Natural Earth, airports from OurAirports, climate 1991-2020 from NOAA GHCN-Daily (public domain). Not affiliated with or endorsed by the European Commission, OpenStreetMap, NOAA or any data provider. Licence: the Cities sheet is a database under the Open Database License (ODbL 1.0); you may share and adapt that sheet under the same licence, crediting © OpenStreetMap contributors. The lessons, answers and charts are for use with your own classes; please do not resell or redistribute them (see README and Sources sheets). Made with AI assistance: built by Lilambd Crossing with Claude (AI) writing the code that assembles the public data; every number comes from the sources above. Custom data packs, maps or worksheets for your class: submissions@lilambd.com Missing something? Tell us in one line what you’d gladly pay for, if someone made it — one-line form: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (or email submissions@lilambd.com, subject “Data wish”). If enough people ask, we build it, and you get it free. Used this? Tell us what you used it for, what was missing, and what you used before: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (one minute, no email asked). Need a specific file or dataset made? Ask here (no promise, quick form): https://docs.google.com/forms/d/e/1FAIpQLSf6V7YALfwE42SaF1re_cLzAoP96TpRg61jE3Nf7UTWEtWRxA/viewform

A complete first course in harmony as 56 printable, write-in worksheets. Students name and write intervals, build and identify triads and their inversions, label chords with Roman numerals, recognise the five main cadences, learn four-part (SATB) voice leading and take their first steps in figured bass. Every page has blank staves or answer lines, a name/date line, and clear one-sentence instructions. Each of the eight units opens with a one-page explanation and engraved examples, and the book ends with a review test, two pages of staff paper and a full answer key. Every interval and chord in the book was generated and then checked by code for correct spelling, and every four-part answer was checked for ranges, doubling and parallel fifths and octaves. Includes US Letter and A4 PDFs (98/96 pages) and a watermarked preview, in 2 zip files. For music teachers, GCSE / A level music theory, homeschool and self-learners. Made with AI assistance (designed and generated by code). Licence: use with your own students and classes; please do not resell or share the files. Missing something? Tell us in one line what you’d gladly pay for, if someone made it — one-line form: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (or email submissions@lilambd.com, subject “Data wish”). If enough people ask, we build it, and you get it free. Used this? Tell us what you used it for, what was missing, and what you used before: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (one minute, no email asked). Need a specific file or dataset made? Ask here (no promise, quick form): https://docs.google.com/forms/d/e/1FAIpQLSf6V7YALfwE42SaF1re_cLzAoP96TpRg61jE3Nf7UTWEtWRxA/viewform

A ready-to-teach GCSE / A level statistics large data set of every country with at least 100,000 people. 22 variables: population, median age, under-15 and over-65 shares, birth and death rates, fertility (now and 1960), life expectancy for men and women (now, 1990, 1960), net migration, urban %, density, GDP per person, CO2 per person, electricity per person, continent and region 12 tasks with worked answers: stratified sampling, mean vs median, quartiles and outliers, box plots by continent, PMCC, regression on log GDP, Spearman’s rank, gender gap, change since 1990, demographic transition, population pyramids, open investigation 24 population pyramids (PNG) from Niger to Japan One Excel workbook: README, Countries, Tasks, Answers, Sources Data: UN World Population Prospects 2024 (CC BY 3.0 IGO), World Bank WDI (CC BY 4.0), Our World in Data / Global Carbon Project / Ember (CC BY 4.0). Licence: use with your own classes and modify; please do not resell the files. Built with our own code from public data; the lesson tasks were drafted with AI help, and every answer was computed from the data. Free sample (25 countries, 3 tasks, 4 pyramids) and an Africa edition (53 countries): search LilambdCrossing on Tes. Custom data packs, maps or worksheets for your class: submissions@lilambd.com Missing something? Tell us in one line what you’d gladly pay for, if someone made it — one-line form: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (or email submissions@lilambd.com, subject “Data wish”). If enough people ask, we build it, and you get it free. Used this? Tell us what you used it for, what was missing, and what you used before: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (one minute, no email asked). Need a specific file or dataset made? Ask here (no promise, quick form): https://docs.google.com/forms/d/e/1FAIpQLSf6V7YALfwE42SaF1re_cLzAoP96TpRg61jE3Nf7UTWEtWRxA/viewform

Real 2023 data for 53 African countries in one clean spreadsheet: population, median age, birth and death rates, fertility, life expectancy (now, 1990 and 1960), migration, urban %, density, GDP per person, CO2 and electricity per person. Includes 12 ready lessons with worked answers (sampling, averages, IQR and outliers, box plots by region, PMCC, regression, Spearman’s rank, gender gap, change since 1990, demographic transition, population pyramids, own investigation) and 12 population pyramids (Niger, Nigeria, Ethiopia, DR Congo, Kenya, Tanzania, Uganda, Egypt, Morocco, Ghana, South Africa, Mauritius). Good for GCSE / A-level / IB Geography and Statistics case studies on development in Africa: a GCSE statistics large data set focused on one continent. Need every country? The World Countries Large Data Set (200 countries): search LilambdCrossing on Tes. Sources: UN World Population Prospects 2024 (CC BY 3.0 IGO), World Bank WDI (CC BY 4.0), Our World in Data / Global Carbon Project / Ember (CC BY 4.0), cited inside. Licence: use with your own classes and modify; please do not resell the files. Built with our own code from public data; the lesson tasks were drafted with AI help, and every answer was computed from the data. Custom data packs, maps or worksheets for your class: submissions@lilambd.com Missing something? Tell us in one line what you’d gladly pay for, if someone made it — one-line form: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (or email submissions@lilambd.com, subject “Data wish”). If enough people ask, we build it, and you get it free. Used this? Tell us what you used it for, what was missing, and what you used before: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (one minute, no email asked). Need a specific file or dataset made? Ask here (no promise, quick form): https://docs.google.com/forms/d/e/1FAIpQLSf6V7YALfwE42SaF1re_cLzAoP96TpRg61jE3Nf7UTWEtWRxA/viewform

Build rock-solid rhythm reading one short drill at a time. This printable book holds 500 four-bar rhythm exercises on a single-line percussion staff, so it works for any instrument, voice, drum pad or classroom clapping. Ten levels take you step by step from quarter and half notes through eighths, dotted rhythms, sixteenths, syncopation, triplets, compound time (6/8, 9/8, 12/8), mixed meters with 5/8 and 7/8, ties across the bar line, and an advanced review that combines everything. Levels 1-4 print a count-along line under every exercise (“1 & 2 &”, “1 e & a”): say every syllable, play only the black ones. Each level opens with a plain-English explanation, a counted example and a suggested metronome range. At the back, a teacher answer guide gives the count of every note and rest in all 500 exercises, so teachers can mark quickly and self-learners can check themselves. You get two PDFs: US Letter (66 pages) and A4 (57 pages), in 2 zip files. Every bar was checked by software to add up exactly to its time signature. Made with AI assistance (designed and generated by code) by Lilambd Crossing. Licence: use it with your own students and classes; please do not resell or share the files. Missing something? Tell us in one line what you’d gladly pay for, if someone made it — one-line form: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (or email submissions@lilambd.com, subject “Data wish”). If enough people ask, we build it, and you get it free. Used this? Tell us what you used it for, what was missing, and what you used before: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (one minute, no email asked). Need a specific file or dataset made? Ask here (no promise, quick form): https://docs.google.com/forms/d/e/1FAIpQLSf6V7YALfwE42SaF1re_cLzAoP96TpRg61jE3Nf7UTWEtWRxA/viewform

Every major and minor key for cello in one clean, consistent layout. Each key page gives you the scale in one, two and three octaves (harmonic and melodic forms for minor keys), broken thirds, the tonic arpeggio, the dominant 7th arpeggio and the diminished 7th arpeggio, with a fingering number above every note and clear clef changes from bass to tenor to treble clef. The book opens with an introduction, a guide to reading the fingerings (including thumb position), a 24-week practice plan with a metronome tempo ladder, and a practice log. Keys follow the circle of fifths, each major key paired with its relative minor. All 5,418 notes were checked by code for the cello range (C2-A5) and the correct key signature. You get a US Letter PDF and an A4 version for home printing, in 2 zip files. Made with AI assistance (designed and generated by code). Fingering generated algorithmically, not proofread by a teacher: treat every fingering as a suggestion and check it with your teacher. Licence: use with your own students; please do not resell or share the files. Missing something? Tell us in one line what you’d gladly pay for, if someone made it — one-line form: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (or email submissions@lilambd.com, subject “Data wish”). If enough people ask, we build it, and you get it free. Used this? Tell us what you used it for, what was missing, and what you used before: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (one minute, no email asked). Need a specific file or dataset made? Ask here (no promise, quick form): https://docs.google.com/forms/d/e/1FAIpQLSf6V7YALfwE42SaF1re_cLzAoP96TpRg61jE3Nf7UTWEtWRxA/viewform

A ready-to-teach migration and refugees data set for geography and statistics lessons, built from official open data. 200 countries (2024): migrant stock and % of population, net migration, remittances (USD and % of GDP), refugees and asylum-seekers hosted, refugees per 1,000 people, refugees originating, IDPs Top 100 refugee corridors (origin → host) World refugees 1990-2024, and refugees from 8 crisis countries 2000-2024 10 tasks with worked answers: trends, ranking by total vs per 1,000, continents, corridors, median and IQR, Spearman’s rank, remittances, push and pull, case studies 3 charts (PNG). Excel workbook, works in Google Sheets. For GCSE, A-level, IB and Cambridge IGCSE 0460 / A Level 9696 population and migration units. Figures are aggregate counts, not individuals. Blank = no data, not zero. Pairs with the World Countries Large Data Set (200 countries, 12 lessons, 24 pyramids): search LilambdCrossing on Tes. Data: UNHCR Refugee Population Statistics Database (CC BY 4.0); UN DESA International Migrant Stock, net migration, remittances and population via World Bank WDI (CC BY 4.0); GDP per person from UN WPP 2024 / World Bank (CC BY 3.0 IGO / CC BY 4.0). Not affiliated with or endorsed by UNHCR, the UN or the World Bank. Cambridge IGCSE is named only to show which syllabus units it fits; not affiliated with or endorsed by Cambridge. Licence: use with your own classes and modify freely. Please do not resell or redistribute the files. Made with AI: built by Lilambd Crossing with Claude (AI) writing the code that assembles the public data; every number comes from the sources above. Custom data packs, maps or worksheets for your class: submissions@lilambd.com Missing something? Tell us in one line what you’d gladly pay for, if someone made it — one-line form: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (or email submissions@lilambd.com, subject “Data wish”). If enough people ask, we build it, and you get it free. Used this? Tell us what you used it for, what was missing, and what you used before: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (one minute, no email asked). Need a specific file or dataset made? Ask here (no promise, quick form): https://docs.google.com/forms/d/e/1FAIpQLSf6V7YALfwE42SaF1re_cLzAoP96TpRg61jE3Nf7UTWEtWRxA/viewform

Take students from “what is a fraction?” to mixed-number word problems in five clear levels. This 60-page printable workbook has 39 one-page practice sheets with over 600 problems. Level 1 covers equivalent fractions with fraction bars and circles. Level 2 is simplifying. Level 3 is adding and subtracting with like and unlike denominators. Level 4 is multiplying and dividing, with area models. Level 5 covers mixed numbers and real word problems. Three cumulative review sheets finish the book. Each level opens with a one-page guide with worked examples and a skills checklist. Every sheet has a name, date and score line and one short instruction. The book also includes a standards mapping table (generic grade bands), a fraction-wall reference page, a certificate of completion and full answer keys. Every answer was computed with a computer algebra system and then checked again against the printed problems by a separate program. You get US Letter and A4 PDFs (vector, prints crisp in colour or black and white) plus a watermarked preview. Made with AI assistance (designed and generated by code) by Lilambd Crossing. You may print it for your own family, classroom or tutoring students. Please do not share or resell the files. Missing something? Tell us in one line what you’d gladly pay for, if someone made it — one-line form: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (or email submissions@lilambd.com, subject “Data wish”). If enough people ask, we build it, and you get it free. Used this? Tell us what you used it for, what was missing, and what you used before: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (one minute, no email asked). Need a specific file or dataset made? Ask here (no promise, quick form): https://docs.google.com/forms/d/e/1FAIpQLSf6V7YALfwE42SaF1re_cLzAoP96TpRg61jE3Nf7UTWEtWRxA/viewform

This set has 40 printable geometry worksheets with figures drawn to scale. Part A covers angles. Students read a real-looking protractor on both scales, estimate and classify angles, and solve complementary, supplementary and vertical angles, angles around a point and triangle angle sums, including algebra angles like (2x + 10)°. Part B covers area and perimeter of rectangles, triangles, parallelograms, trapezoids, circles, semicircles, composite L, T and U shapes and shaded regions, and finishes with real-world problems and reviews. Every figure is a crisp vector drawing with its measures clearly labelled. The labels were checked by computer against the drawing itself, so heights really are perpendicular, angles really measure what they say, and every answer matches its figure. The answer keys show full working (for example A = ½ × 12 × 7 = 42 cm²), and circle answers are given both in terms of π and with π ≈ 3.14. You get US Letter and A4 PDFs (53 pages: 40 worksheets plus standards map, formula reference and answer keys) and a watermarked preview. Made with AI assistance (designed and generated by code) by Lilambd Crossing. You may print it for your own classes and students. Please do not share or resell the files. Missing something? Tell us in one line what you’d gladly pay for, if someone made it — one-line form: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (or email submissions@lilambd.com, subject “Data wish”). If enough people ask, we build it, and you get it free. Used this? Tell us what you used it for, what was missing, and what you used before: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (one minute, no email asked). Need a specific file or dataset made? Ask here (no promise, quick form): https://docs.google.com/forms/d/e/1FAIpQLSf6V7YALfwE42SaF1re_cLzAoP96TpRg61jE3Nf7UTWEtWRxA/viewform

Turn your interactive whiteboard into the right kind of paper in one click. This pack gives you 20 clean, high-contrast teaching backgrounds. It includes primary handwriting lines with a dashed midline, music staves with a treble clef, graph paper, coordinate grids (four-quadrant and first-quadrant), a blank world map outline and four number lines. You also get a hundred chart, double ten frames, a monthly calendar, a timeline, 2- and 3-circle Venn diagrams, a T-chart, a KWL chart, a story map, a Frayer model, a daily agenda board and a place value chart. Every design comes in a light white-board version and a dark navy version, which is gentler in dim rooms and on glossy screens. That makes 40 boards. Lines are thick enough to read from the back of the classroom, labels are large and bold, and colour is never the only cue. You get Full HD 1920x1080 PNGs plus a 40-page 16:9 PDF with bookmarks. They work in any whiteboard software or as slide backgrounds. The world map uses public-domain Natural Earth coastlines. Made with AI assistance (designed and generated by code) by Lilambd Crossing. You may use it in your own teaching, including paid classes, but please do not resell or share the files. Missing something? Tell us in one line what you’d gladly pay for, if someone made it — one-line form: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (or email submissions@lilambd.com, subject “Data wish”). If enough people ask, we build it, and you get it free. Used this? Tell us what you used it for, what was missing, and what you used before: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (one minute, no email asked). Need a specific file or dataset made? Ask here (no promise, quick form): https://docs.google.com/forms/d/e/1FAIpQLSf6V7YALfwE42SaF1re_cLzAoP96TpRg61jE3Nf7UTWEtWRxA/viewform

Real electricity data for maths, geography and science lessons. Countries: 80 countries in 2024, electricity mix by fuel (coal, gas, oil, nuclear, hydro, wind, solar, bioenergy), renewables and fossil share, carbon intensity, electricity per person, GDP per person TimeSeries: World plus 15 countries, 1990-2025 (renewables, fossil, solar, wind, carbon intensity) PowerPlants: the 500 largest power plants with fuel, capacity, opening year and location 10 ready tasks with worked answers: pie charts, mean vs median, quartiles, Spearman’s rank, PMCC, percentage growth, line graphs, mapping, data-based debate Charts: world map of the largest plants, renewables trend, carbon vs renewables Data: Ember and Our World in Data (CC BY 4.0), WRI Global Power Plant Database (CC BY 4.0), World Bank (CC BY 4.0), UN WPP (CC BY 3.0 IGO), Natural Earth (public domain). Licence: use with your own classes; please do not resell. Built with our own code from public data; the lesson tasks were drafted with AI help and every answer was computed from the data. Custom data packs, maps or worksheets for your class: hello@lilambd.com

Real hazard data your students can sort, graph and test, with no internet searching needed. Every M6+ earthquake 1975-2025 (7,199 rows: date, depth, magnitude, place) 2,970 significant earthquakes since 1950, with deaths, houses destroyed and the country’s GDP per capita and income band, for “effects by level of development” questions 530 volcanic eruptions (VEI, deaths) and 1,664 tsunamis since 1900 10 ready tasks with worked answers: plate-boundary patterns, depth, trends, mean vs median, Spearman’s rank, case-study pairing Maps: M6+ quakes by depth on a world map, deaths by income band, blank grid Data: USGS ComCat and NOAA NCEI/WDS hazard databases (US Government, public); World Bank GDP (CC BY 4.0); UN WPP (CC BY 3.0 IGO); Natural Earth (public domain). Licence: use with your own classes; please do not resell. Built with our own code from public data; the lesson tasks were drafted with AI help and every answer was computed from the data. Custom data packs, maps or worksheets for your class: hello@lilambd.com

A real-world large data set for statistics lessons, built from 30-year climate normals (1991-2020) for 60 cities on every continent. Excel workbook: Cities (22 variables per city: latitude, Koppen class, temperature, rainfall, humidity, sunshine, frost days, warming trend, records), Monthly (60 cities x 12 months), 12 ready tasks, worked answers, sources. 60 climate graphs (PNG), one per city. Covers sampling, averages, quartiles and outliers, box plots, scatter and PMCC, regression, Spearman’s rank, and a hypothesis test on warming rates. Works for GCSE, A-level, IB and AP Statistics, and for geography climate units. Data: NASA POWER (public), NOAA GHCN-Daily (public), Natural Earth (public domain). City names and coordinates © OpenStreetMap contributors, Overture Maps Foundation (ODbL). Licence: use with your own classes; please do not resell. Built with our own code from public data; the lesson tasks were drafted with AI help and every answer was computed from the data. Custom data packs, maps or worksheets for your class: hello@lilambd.com

A free taste of the World Countries Large Data Set for GCSE / A level statistics: 25 countries with all 22 variables, the first 3 lessons, and 4 population pyramids (Germany, Niger, India, Japan). The full set has all 200 countries, 12 lessons with worked answers and 24 pyramids: search LilambdCrossing on Tes. Data: UN World Population Prospects 2024 (CC BY 3.0 IGO), World Bank WDI (CC BY 4.0), Our World in Data / Global Carbon Project / Ember (CC BY 4.0). Built with our own code from public data; the lesson tasks were drafted with AI help, and every answer was computed from the data. Custom data packs, maps or worksheets for your class: submissions@lilambd.com Missing something? Tell us in one line what you’d gladly pay for, if someone made it — one-line form: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (or email submissions@lilambd.com, subject “Data wish”). If enough people ask, we build it, and you get it free. Used this? Tell us what you used it for, what was missing, and what you used before: https://docs.google.com/forms/d/1tzMQtHsEbMg7JyMk7YGqslHijfNTciByi8wrwjQpUPY/viewform (one minute, no email asked). Need a specific file or dataset made? Ask here (no promise, quick form): https://docs.google.com/forms/d/e/1FAIpQLSf6V7YALfwE42SaF1re_cLzAoP96TpRg61jE3Nf7UTWEtWRxA/viewform

Free sample of the full World Energy & Electricity Data Pack (in my Tes shop): 12 of the 80 countries, the World time series and 3 of the 10 tasks. Try it with your class before you buy. Real electricity data for maths, geography and science lessons. Countries: 80 countries in 2024, electricity mix by fuel (coal, gas, oil, nuclear, hydro, wind, solar, bioenergy), renewables and fossil share, carbon intensity, electricity per person, GDP per person TimeSeries: World plus 15 countries, 1990-2025 (renewables, fossil, solar, wind, carbon intensity) PowerPlants: the 500 largest power plants with fuel, capacity, opening year and location 10 ready tasks with worked answers: pie charts, mean vs median, quartiles, Spearman’s rank, PMCC, percentage growth, line graphs, mapping, data-based debate Charts: world map of the largest plants, renewables trend, carbon vs renewables Data: Ember and Our World in Data (CC BY 4.0), WRI Global Power Plant Database (CC BY 4.0), World Bank (CC BY 4.0), UN WPP (CC BY 3.0 IGO), Natural Earth (public domain). Licence: use with your own classes; please do not resell. Built with our own code from public data; the lesson tasks were drafted with AI help and every answer was computed from the data. Custom data packs, maps or worksheets for your class: hello@lilambd.com

Free sample of the full pack “Tectonic Hazards Data Pack” (search LilambdCrossing on Tes). Try a few tasks and the data with your class before you buy. Real hazard data your students can sort, graph and test, with no internet searching needed. Every M6+ earthquake 1975-2025 (7,199 rows: date, depth, magnitude, place) 2,970 significant earthquakes since 1950, with deaths, houses destroyed and the country’s GDP per capita and income band, for “effects by level of development” questions 530 volcanic eruptions (VEI, deaths) and 1,664 tsunamis since 1900 10 ready tasks with worked answers: plate-boundary patterns, depth, trends, mean vs median, Spearman’s rank, case-study pairing Maps: M6+ quakes by depth on a world map, deaths by income band, blank grid Data: USGS ComCat and NOAA NCEI/WDS hazard databases (US Government, public); World Bank GDP (CC BY 4.0); UN WPP (CC BY 3.0 IGO); Natural Earth (public domain). Licence: use with your own classes; please do not resell. Built with our own code from public data; the lesson tasks were drafted with AI help and every answer was computed from the data. Custom data packs, maps or worksheets for your class: hello@lilambd.com

Free sample of the full pack “World Weather Large Data Set” (search LilambdCrossing on Tes). Try a few tasks and the data with your class before you buy. A real-world large data set for statistics lessons, built from 30-year climate normals (1991-2020) for 60 cities on every continent. Excel workbook: Cities (22 variables per city: latitude, Koppen class, temperature, rainfall, humidity, sunshine, frost days, warming trend, records), Monthly (60 cities x 12 months), 12 ready tasks, worked answers, sources. 60 climate graphs (PNG), one per city. Covers sampling, averages, quartiles and outliers, box plots, scatter and PMCC, regression, Spearman’s rank, and a hypothesis test on warming rates. Works for GCSE, A-level, IB and AP Statistics, and for geography climate units. Data: NASA POWER (public), NOAA GHCN-Daily (public), Natural Earth (public domain). City names and coordinates © OpenStreetMap contributors, Overture Maps Foundation (ODbL). Licence: use with your own classes; please do not resell. Built with our own code from public data; the lesson tasks were drafted with AI help and every answer was computed from the data. Custom data packs, maps or worksheets for your class: hello@lilambd.com