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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: practical - rates of reaction - iodine clock
Drogchem

Chemistry: practical - rates of reaction - iodine clock

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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
Calculations - titrations, back titrations, empirical formulae and waters of crystallisation
Drogchem

Calculations - titrations, back titrations, empirical formulae and waters of crystallisation

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This resource consists of 4 worksheets (13 pages of problems in total). The problems require students to write balanced equations (some are redox) and use calculations to solve the problem. The problems would suit AS and A2 students or those wanting to compete in National Chemistry Olympiad competitions. (18 Jan2018 post script: an additional 2 w/s have been added that focus only on waters of crystallisation).
Chemistry for Chinese students learning English: words, terms and useful resources
Drogchem

Chemistry for Chinese students learning English: words, terms and useful resources

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This resource contains a number of worksheets and activities that will help Chinese students learn Chemistry in an English school environment. It includes: * 3 page dictionary of key English chemistry science words (both Chinese and English). Parts of this list have been broken down into smaller themed lists to act as worksheets for the students (eg periodic table; acids and bases). * A Chinese period table, * Metals/non metals worksheets (with pictures to describe properties and a practical activity) * Equipment worksheet * A funworder requiring the student to find the English element * Some cloze style activities * A crossword and other starters. 2-Sept-16: an updated list of Chinese words has been added with some small corrections.
Organic Chemistry: Alkane and Alkenes- draw and/or name (5 pages) for AS and IB students
Drogchem

Organic Chemistry: Alkane and Alkenes- draw and/or name (5 pages) for AS and IB students

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This resources contains 5 pages of problems (2 double-sided wrk sheets) that include * Alkanes: name and / or draw isomers * Alkenes: naming and/or draw isomers, organic transformations and geometric isomer problems. In the latter case students are asked to work out how many isomers are possible for a compound with multiple double bonds). This worksheets will suit students studying for AS or IB organic chemistry. they can be sued as 2 sided w/s or as separate w/s as starters. Answers are provided.
Chemistry: sparingly soluble solids, solubility product and the Common Ion Effect (16-18 yr old).
Drogchem

Chemistry: sparingly soluble solids, solubility product and the Common Ion Effect (16-18 yr old).

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This resource consists of a 1 x 6-page worksheet and answers. It covers definitions, short answer questions and calculations (solubility products, solubility, common ion effect). These w/s would suit students doing Cambridge A2, IB and other higher order chemistry courses. (some typos were removed 1 May 2018). Please leave feedback about whether this material meets your needs or if you find any mistakes.
Science words and activities for Chinese students learning English as a second language (14-18 yrs)
Drogchem

Science words and activities for Chinese students learning English as a second language (14-18 yrs)

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Thank you to all those who have bought this resource. Please leave feedback as it helps me better align the material to student needs. This resource bundle (85) combines material from multiple resources focused on Science for Chinese students learning English as a second language. The purpose of the bundle is to provide material for teachers who have native Chinese speakers in their class. The students are regularly put into other subjects (eg Science) as part of the experience yet often with limited material that targets both language and content knowledge. This material has been trialed on 20 students over 12 months and refined over the year. This bundle includes material in biology, physics, chemistry and astronomy. Specifically, * A list of translated general science question phrases typically asked in worksheets and exams * A list of useful describing words when filling out worksheets and exams * Chemistry: translated list of words (fill in Chinese or English versions), works sheets covering periodic tale, electron configuration, acid/base, PT trends, fun worders, cross word puzzles, cloze-style activities, short answer questions, True/False activities, 15-20 minute tests, PT, who am I activities and a metal-non metal practical activity. * Biology: translated list of words (fill in Chinese or English versions), anatomy diagrams for labeling, plants/flower diagrams for labeling, short answer questions, ecology x-wrds, poster activity, classification activity. * Physics: translated list of words (fill in Chinese or English versions), light and sound x-word, graph w/s, calculation w/s, forces w/s, pressure w/s and power w/s, mechanics w/s * Astronomy: translated list of words (fill in Chinese or English versions), short answer questions, word finder. Admittedly, there is slightly more chemistry resources than physics. The students told me that chemistry and biology (and the associated terms) were their biggest issue. Please leave me feedback to let me know what and how I can improve the bundle or tell me of material you are searching for.
Chemistry: Buffer calculations and interpretation of titration curves (A2 and IB students)
Drogchem

Chemistry: Buffer calculations and interpretation of titration curves (A2 and IB students)

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This resource consists of 2 pages of notes and calculation examples and a 3-pge worksheet to help the teacher or student grapple with buffer calculations. The target is A2 and IB students. The worksheet (and answers) is based on one specific weak acid strong base titration and has 3 pages of calculations to show the student the effect the addition of OH ions has on the final pH. The format ensures students get to practice on the same system and therefore minimise cognitive overload. Students are encouraged to think about what species are in solution and what part of the titration curve each calculation relates to. I also encourage a novel way of setting out the calculations ,which I (and my students) believe minimises potential mistakes.
Chemistry: Balancing REDOX equations: notes and problems
Drogchem

Chemistry: Balancing REDOX equations: notes and problems

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This resource consists of some general REDOX notes, which outline how to balance REDOX equations and 2 double sided worksheets (and answers). The exercises include oxidation number elucidation, balancing half equations and balancing full equations. This resource would suit students who want to progress in the Honors program.
Chemistry: Assignment of 13C-NMR spectra to structural isomers
Drogchem

Chemistry: Assignment of 13C-NMR spectra to structural isomers

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This resource consists of 5 pages worth of problems containing spectra for 14 compounds. Typically, a molecular formula is given along with 3-4 spectra and the student is then expected to reason using the number of peaks and the signal position which spectra belongs with which structural isomer. This resource would suit students doing A2 or other advanced Chemistry courses. All attempts have been made to ensure the answers are correct. Please get in touch with me if you find an error and I will address it and send you an updated version.
1H- NMR problems - Assignment of spectra and elucidation of unknowns for A2 students
Drogchem

1H- NMR problems - Assignment of spectra and elucidation of unknowns for A2 students

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This resource would suit A2 students. It contains 4 pages of problems, which can either be printed on both sides and made into an 4-page booklet or used as two separate 2-page problem sheets. The problems focus on the assignment of signals to the different hydrogen environments in 2-5 carbon organic aliphatic molecules. Some problems ask the student to distinguish between isomers based on the number and type of signals. The start of the worksheet asks students to decide how many signals they can expect based on symmetry arguments. In all cases students are asked to justify their assignments. Other worksheets are currently being developed that will include aromatic systems and problems based on the combination of IR, Mass spec, 1H and 13C NMR spectra. If you find any mistakes please give me feedback and I will address and send you an updated version.
Chemistry: Electrochemistry - REDOX and electrolysis material for AS-A2 students
Drogchem

Chemistry: Electrochemistry - REDOX and electrolysis material for AS-A2 students

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This resource pack consists of material that will be covered in the AS and A2 program. It includes + Power point (53 slides) covering: oxidation number and balancing REDOX equations revision, REDOX calculations, batteries, Nernst equation and electrolysis. + Summarised CIE learning objectives + Student notes - REDOX (8 pages) that summarise the slides + Student notes – balancing REDOX equations + 7 -11 work sheets depending on whether double sided or a booklet (19 pages of problems) and answers. + Practicals (4) Buying this bundle will mean buying material used over two years so hopefully it is save you time and be viewed as value for money. Please note, some of these resources are already available on TES but as smaller bundles. 17 Aug 16: A recent typo was found on the electrolysis w/s and it has been updated (Q4, IV).
Chemistry: test / worksheet - atomic structure
Drogchem

Chemistry: test / worksheet - atomic structure

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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
Biology: punnett square problems and interpretation of pedigree charts
Drogchem

Biology: punnett square problems and interpretation of pedigree charts

(1)
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.
Electricity: interpreting circuits, calculations and some harder structured questions
Drogchem

Electricity: interpreting circuits, calculations and some harder structured questions

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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.
Chemistry: balancing word and symbol equations involving metals
Drogchem

Chemistry: balancing word and symbol equations involving metals

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This resource consists of 4 work sheets and answers. It would suit students aged 14-16 learning to balance word and symbol equations. WS1 contains 20 word and symbol equations involving the reaction of metals with oxygen, chlorine, water or an acid. WS2 contains 20 word and symbol equations involving reactions between metal salts (carbonates, hydroxides and oxides) and acids WS3 requires the students to complete acid base word and symbol equations WS4 requires symbol equations for reactions with metals. Some of these resources appear elsewhere.
Aromatic chemistry for A2 students
Drogchem

Aromatic chemistry for A2 students

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This resource consists of 6 pages of problems (questions, mechanism and 'complete the reaction scheme' questions) targeting the A2 Cambridge program. Answers are provided. The problems and answers have been checked but if there are any errors or questions, please get in touch with me and I will address them. If you would like a certain type of worksheet please contact me as I am working on other ones for my classes and I will reorder my efforts if I think it can be useful to others.
AS Organic Chemistry for Cambridge (and IB): alkanes, alkenes, acids, esters, mechanisms etc
Drogchem

AS Organic Chemistry for Cambridge (and IB): alkanes, alkenes, acids, esters, mechanisms etc

(0)
This resource consists of a series of w/s with themed problems (and answers). There are 20 pages worth of material (2-4 page w/s) as well as the CIE learning objectives (2016) and the accompanying ppt slides (69 slides). Problems include naming and drawing compounds, writing mechanisms (SN1 and SN2), elucidating reaction schemes, geometric isomers, unknowns and definitions etc. updated 9 Nov (pptn was missing)
Chemistry: difficult chemical calculation problems
Drogchem

Chemistry: difficult chemical calculation problems

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This resource consists of 4 problems in which the student has to work out the % of different compounds in a mixture. They are challenging and would suit mathematically strong students who are enrolled in Honors, AP or who want to compete in the National Chemistry Olympiad competition.
Chinese-English- Learning and using the terms used in Genetics
Drogchem

Chinese-English- Learning and using the terms used in Genetics

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This resource consists of 2 worksheets consisting of lists of key genetics words in which the student has to add the correct term -in English or Chinese. A worksheet where the student chooses the correct word to complete the sentence (5 min starter) There is also a 2-page worksheet (and answers) that asks the students to fill out some punnet squares and carry out simple calculations (these are written in English).