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I taught chemistry for 25 years. I now provide tuition online. I just like nicely produced, imaginative resources.

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I taught chemistry for 25 years. I now provide tuition online. I just like nicely produced, imaginative resources.
Solid, liquid or gas?
simondobbssimondobbs

Solid, liquid or gas?

(0)
Students work out the state different substances are in at room temperature, given their melting point and boiling point.
GCSE polymers
simondobbssimondobbs

GCSE polymers

(0)
A very simple worksheet to aid the distinction of addition polymers from condensation polymers. Explanation on page 1, questions on page 2.
Summer Science Mega Wordsearch
simondobbssimondobbs

Summer Science Mega Wordsearch

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A learn-by-not-working activity suitable for the end of the summer term. Comes complete with the solution. 65 words from the three sciences. Word list on separate page.
curcumin
simondobbssimondobbs

curcumin

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A worksheet asking questions about the chemistry of unknown substances, as the exam boards do.
Cut & stick molecular shape
simondobbssimondobbs

Cut & stick molecular shape

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Sixth formers love cut & stick. They reinforce understanding and promote discussion. Cut sheet and stick sheet, with spaces to write in bond angles, number of bonding pairs and number of lone pairs.
Reaction mechanism revision.
simondobbssimondobbs

Reaction mechanism revision.

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I made a series of templates for the main aliphatic reaction mechanisms in OCR chemistry A level. They resemble exam questions where students have to complete the reaction with partial charges, lone pairs and curly arrows. The intention is that they can be printed out by students as often as is required, for practice. A solution is provided for each example. Included are: nucleophilic substitution, electrophilic addition, nucleophilic addition, radical substitution and elimination. April 2025: added aromatic mechanism
2,2,4-trimethylpentane- an interesting molecule.
simondobbssimondobbs

2,2,4-trimethylpentane- an interesting molecule.

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2,2,4-trimethylpentane, or iso-octane used to feature heavily in the OCR Salters A level chemistry, because it is an important additive to petrol. It has slipped out of the specification, but the examiner must be sitting on many questions that might be recycled to test understanding. This is a simple information sheet that gives answers to a legacy question that one of my students was completing. It aims to answer difficulties with the question in a graphic way. The sheet runs to three pages and examines isomerism.