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I am a Science and Chemistry teacher focused on Cambridge IGCSE and AS/A. I am also heavily involved in the National Chemistry Olympiad program. By way of background I have a PhD in inorganic chemistry and entered teaching after 13 years in the food industry. I guess I am a bit old fashioned - I don't use twitter and I have no idea what instagram or Pinterest are......but I love my subject and I love working with students.

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I am a Science and Chemistry teacher focused on Cambridge IGCSE and AS/A. I am also heavily involved in the National Chemistry Olympiad program. By way of background I have a PhD in inorganic chemistry and entered teaching after 13 years in the food industry. I guess I am a bit old fashioned - I don't use twitter and I have no idea what instagram or Pinterest are......but I love my subject and I love working with students.
Chemistry: weak acid-base and difficult buffer calculations-1

Chemistry: weak acid-base and difficult buffer calculations-1

This resource contains 9 pages of detailed notes and worked examples as well as a 4-page worksheet that contains some straight forward to difficult (using a quadratic equation) pH calculations. The detailed notes work though a variety of scenarios and some of the associated misconceptions. The notes would be useful for both new chemistry teachers and students. The problems will be suitable for students in an Honors or AP course or those wanting to trial for the National Chemistry Olympiad competition. Other problem worksheets re also available at Drogchem. Key words: buffer, acid, base, acidity constant, pH calculations.
Drogchem
Chemistry: Periodic table made fun (12-15 year olds) - material for 3-4 weeks worth of teaching

Chemistry: Periodic table made fun (12-15 year olds) - material for 3-4 weeks worth of teaching

This resource consists of all of the material a teacher would need to teach a 3-4 week topic on this most delightful of topics: the Periodic table. Most of the focus is on the PT trends, how it can be used to predict a property of an element or charge on an ion. The activities have been tried in my class over the past few years and the students feedback and improved grades suggest they add value. My bug bear as a Chemist is that the PT is often taught as "first 20 by rote" with little time spent showing students how they can use the PT to help answer questions or solve problems. The topic covers subatomic particles, electron configuration, formation of ions, compounds/molecules, reactions of group 1 and 2 metals with group 6 and 7 non-metals and the tests for H2, O2 and CO2. Resources include worksheets, cloze activities, starters, projects, identifying equipment activity and short tests. The “notes for teachers” outlines how I teach this subject for both low and higher ability students along with ideas of the projects I set the students. Some documents contain more than 1 worksheet or activity and some worksheets are 2 pages long. Additional slides have been included on balancing equations if the class is stronger. Either use them in this course or save for the following year. Some of this material appears in other resources at Drogchem's shop (eg balancing equations and funworders). Thank you to everyone that bought this resource. If you get a spare 2 minutes could you leave some feedback? It is the only way I will know whether it meets your needs or what I might need to do to develop it further.
Drogchem
Biology: punnett square problems and interpretation of pedigree charts

Biology: punnett square problems and interpretation of pedigree charts

This resource contains two double sided problem sheets (and answers). The first is a series of punnet square focused problems and the 2nd asks students to interpret and answer questions from two pedigree charts. Both also contain some short answer questions. It will suit students who have not studied Genetics before. Key words: homozygous, heterozygous, dominant, recessive, punnet squares, zygote, chromosomes, pedigree charts.
Drogchem
Chemistry: test - spectroscopy

Chemistry: test - spectroscopy

This is a 1 hour test (or work sheet). There are 3 questions (8 pages long). Each requires the student to use information from Infra Red, Mass Spectrometry and C-13 NMR spectra to elucidate the different compounds. Students are expected to give evidence to support their assignments. This test would be useful for AP or Honors students. Answers are included.
Drogchem
Chemistry: practical - rates of reaction - iodine clock

Chemistry: practical - rates of reaction - iodine clock

This practical gets students to measure the rate of reaction when a thiosulfate solution is mixed with hydrogen peroxide. The resource includes a brief background to the experiment, a sheet to record data and some instructions for the Technician to help make up the solutions. This resource can be used for younger students to improve their experimental technique and interpretation and graphing skills (leave out the chemical equations) or for A2 Cambridge, Honors or AP students who wish to measure more detailed reaction kinetics. Some errors were found and have since been addressed (2016) Key words: kinetics, reaction rate, collision theory, iodine clock reaction, experiment
Drogchem
Anatomy - IGCSE: circulatory, digestive, endocrine system and the eyes: questions and diagrams

Anatomy - IGCSE: circulatory, digestive, endocrine system and the eyes: questions and diagrams

This resource consists of 7 worksheets made largely of diagrams that require labeling (heart, lungs, endocrine, digestive and the eye), some questions that require short answers and a cross word. This is that resource you struggle to find: some diagrams that can be labelled and then some questions to follow. This resource would suit a range of students depending on the national curricula (eg. IGCSE).
Drogchem
States of matter w/s; Elements/compounds/molecules and mixtures w/s and True or False starter

States of matter w/s; Elements/compounds/molecules and mixtures w/s and True or False starter

This resource consists of 3 worksheets (some double sided) and answers. The first is a starter activity (T or F) and takes about 10-20 minutes to complete. The elements-compounds-molecules and mixtures worksheet has a variety of exercises. The states of matter worksheet largely focuses on a number of short answer questions based on every day scenarios. There are also some diagrams to complete. The resources target students who are in year 8-10 (13-15 years old) depending on curriculum.
Drogchem
Chemistry: pH calculations of strong acids and bases

Chemistry: pH calculations of strong acids and bases

This resource consists of 2 worksheets: 25 calculation problems (and worked answers) involving aspects of acid base chemistry and some general pH calculation notes, which initially cover simple calculations. . The first half of each work sheet covers pH calculations in both acid and base conditions and calculation of H+ and OH- ion concentrations. The 2nd side of the worksheets focus on pH calculations involving partial neutralisation reactions where the student has to work out what species is in excess before calculating the pH. Some problems also involve the use of n=m/M equation. These problems would suit students interested in Honors, AP or wanting to enter the National chemistry Olympiad competition.
Drogchem
Chinese - Geology

Chinese - Geology

This bundle of resources contains material that will help a native Chinese student manage the new language and subject material that will likely appear in a geology lesson. It includes word lists in Chinese and English that need to accompanying word in the other language, cloze activities, a test and a diagram to label.
Drogchem
Tongan-English Science words used in physics and practical laboratory lessons

Tongan-English Science words used in physics and practical laboratory lessons

This resource contains key words that Tongan students will need to learn if they are to manage science lessons in physics and laboratory practical sessions. TESOL teachers will note that direct word for word translations are not easy and often multiple words are needed to explain a concept. I have used a Tongan teacher to help me with the translations. A key strategy I use is to ask the students to draw diagrams to help them explain what they mean.
Drogchem
Chemistry: test / worksheet - atomic structure

Chemistry: test / worksheet - atomic structure

This resource is two pages long and covers the following topics: atomic structure, balanced word and symbol equations, balancing a combustion reaction, interpreting electronic configuration, an electrolysis question (ZnBr2) and forming ionic compounds. It could be used as either a test or a worksheet. Answers are included. The level would be useful for entry level chemistry students
Drogchem
Chemistry: Lewis structure and molecular shapes problems-ws1

Chemistry: Lewis structure and molecular shapes problems-ws1

This resource has a set of notes with worked examples to explain how to determine Lewis structures, molecular shapes and formal charges. The accompanying worksheet uses these skills to predict shapes and reason the bond angles. Some problems are based on the comparison of two molecules.
Drogchem
Physics: motion - v =d/t and a = v/t problems

Physics: motion - v =d/t and a = v/t problems

This resource contains 2 worksheets (6 pages of varying problems) and answers. ws1: calculations using the equation v = d/t including rearrangement. Some problems ask the student to convert different units (eg seconds to hours). ws2: calculations using the equation a = v/t. The problems include interpreting graphs, drawing graphs, calculations and unit conversions. It is 4 pages long so fits a fold A3 page. The problems would suit students interested in AP or honors. All questions are based on metric units.
Drogchem
Periodic table fun-worder (including atomic numbers) and other activities

Periodic table fun-worder (including atomic numbers) and other activities

This resource contains two fun-worders based around the first 20 elements of the periodic table. In the first fun-worder, the student has to find the element. Each element succeeds its atomic number (find the name and you find the atomic number). The 2nd fun-worder has both the proton number (before the word) and the atomic mass (after the word). The student then fills in the periodic table grid (supplied) in the correct order. The students love these activities and it can take a good 45 minutes to complete. It is fun and builds familiarity with the PT. Other shorter activities are included: match symbols and names, and electron configuration practice.
Drogchem
Chemistry: balancing word and symbol equations involving metal salts with acid

Chemistry: balancing word and symbol equations involving metal salts with acid

There are two worksheets (with worked answers) in this resource. WS1 focuses on word equations and limits reaction to those of oxides, hydroxides and carbonates. Notes are also provided. The intention is for students to get used to the idea of always writing down the salt and that water is the other product. WS2 asks students to balance the symbol equations. The equations are limited to acids reacting with oxides, carbonates and hydroxides. Both worksheets are also part of a larger resource called "Chemistry: balancing equations involving metals and their salts". This resource will suit students learning about balancing equations for the first time.
Drogchem
Chemistry: balancing difficult REDOX equations

Chemistry: balancing difficult REDOX equations

This resource consists of some general REDOX notes and 1 work sheet with 6 hard-to-difficult REDOX reactions to balance. The difficulty is due to the fact the students must first convert word equations into symbols. One problem requires them to balance under alkaline conditions and the metal product is not immediately obvious. The problems introduce the students to uncommon reactions where the acid itself is converted to products other than hydrogen gas. This worksheet would be suitable for students doing AP, Honors or wanting to take part in the National Chemistry Olympiad competition.
Drogchem
Chemistry: thermochemistry: using q = mCΔT and  Hess's law

Chemistry: thermochemistry: using q = mCΔT and Hess's law

There are 2 worksheets (and answers) as well as notes and worked examples (ws2). WS1 has 2 pages of questions where the student has to choose whether a reaction is either endothermic or exothermic, draw and label an energy profile. There are also some simple calculations to determine the amount of energy given off from a known mass of an organic compound. WS2 contains notes, worked examples and 10 problems (and answers) focused on the equation Using q = mCΔT and Hess's law. The problems will be useful for students enrolled in Honors, AP or those who would like to sit the National Chemistry Olympiad competition. The problems are of straight forward to moderate difficulty. Key words: Hess's law, thermochemistry, enthalpy, heat, thermodynamics, calculations.
Drogchem
For Chinese native speakers - learning the English words for the elements of the periodic table

For Chinese native speakers - learning the English words for the elements of the periodic table

These activities were developed to help native Chinese students learn the English words for the elements of the periodic table. Our lessons are slower than in the typical timetabled class. I found that these worksheets helped the students gain confidence in the spoken and written word as well as learn about the periodic table. Over a 2 week period and many practical activities there was a significant increase in their communication and general engagement in the classroom. This resource bundle includes a funworder where the student must find the element (and atomic number) based on the Chinese word; two worksheets which require the student to fill in the English word or the Chinese word and a cross word puzzle. Answers are included. I am not a native Chinese speaker and have had the resources checked by a native speaking Chinese student. If there are any errors please get in touch and I will make the appropriate changes. I would also like feedback as I have a series of resources I will be publishing in the coming weeks. Your feedback will help direct my focus.
Drogchem
Electricity: interpreting circuits, calculations and some harder structured questions

Electricity: interpreting circuits, calculations and some harder structured questions

This resource consists of two 4-page worksheets (and answers). The first w/s asks the student to interpret some series or parallel circuit diagrams and calculate either I, V, R or P. The second starts with some simple calculations but finishes with short-answer questions in which the student needs to reason (rather than reach for the calculator) an answer. It encourages students to write WHY rather than just supply a simple number. If the buyer finds any mistakes please tell me and I will update the resources and send an updated version.
Drogchem
Physics: Electricity calculations-1: Using and interpreting V=IR, P=IV and P=W/t

Physics: Electricity calculations-1: Using and interpreting V=IR, P=IV and P=W/t

This resource consists of 2 worksheets and answers. Each takes about 40-60 minutes to complete so they are useful for finishing off a lesson or as homework. WS1 starts be getting students to practice rearranging equations and then to apply the equations to solve for one unknown.. The worksheets are suitable for students new to the use of and interpretation of the equations V=IR, P=IV and P=W/t. Some short answer questions are included in WS2 that ask students to compare different components in series and parallel circuits (eg. bulbs and degree of brightness). The questions are designed to get students thinking about why something is observed (cf just calculations). Key words: calculations, electricity, power, watt, volts, current, resistance, series, parallel, ohm, amps, energy Other resources of greater difficulty will be available after they have been proof-read.
Drogchem