All articles by Neil Goalby

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Limiting and excess reactants: quantitative | Developing understanding | 14–16 years

Develop learners quantitative understanding of limiting and excess reactants with the support of bar diagrams

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Bondio ïonig | Datblygu dealltwriaeth | 14–16 oed

Datblygu dealltwriaeth y dysgwyr o ddellt ïonig drwy gymharu cynrychioliadau 2D a 3D 

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Why you should bring news stories into your chemistry lessons

2026-06-12T07:29:00Z

Because current affairs make chemistry topics concrete and relatable for learners. Start with the Strait of Hormuz and the Haber process

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Reacting ratios: gas volumes | Developing understanding | 14–16 years

Connect learners’ ideas about balanced equations, the ratio of atoms and moles and the volume of reactants and products

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Symbols and formulas | Developing understanding | 11–14 years

Develop your learners’ understanding of what is represented by symbols and chemical formulas

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Give science lessons a real-life context

2026-05-05T07:45:00Z

Keep your learner’s curiosity burning by relating your topic to current issues and everyday life with these five approaches

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Limiting and excess reactants (qualitative) | Developing understanding | 14–16 years

Introduce limiting and excess reactants using an analogy of ice cream and ice cream cones

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Concentration and moles | Developing understanding | 14–16 years

Support learners to develop secure mental models of how concentration is measured and calculated in mol/dm³

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Word equations | Developing understanding | 11–14 years

Use this worksheet to improve your learners’ understanding of writing and interpreting word equations

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Yield | Developing understanding | 14–16 years

Part of the Johnstone’s triangle series, this resource includes teacher notes and a student worksheet to help learners understand the difference between actual and theoretical yield

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Interpreting chemical equations for ionic compounds | Developing understanding | 14–16

Help your learners develop mental models of what is represented in balanced chemical equation for ionic compounds with this resource, including teacher notes and a student worksheet 

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Moles and volume | Developing understanding | 14–16 years

Deepen your learners’ understanding of the idea that equal volumes of gases contain an equal number of molecules with this worksheet

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Moles and mass | Developing understanding | 14–16 years

Develop understanding of the relationship between the mass of one mole, the number of moles and the mass of a substance

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Molau a màs | Datblygu dealltwriaeth | 14–16 oed

Datblygu dealltwriaeth o’r berthynas rhwng màs un môl, nifer y molau a màs sylwedd

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Reactant and product substances | Developing understanding | 11–14

Use these worksheets to secure and deepen your learners’ understanding of reactants and products in chemical changes

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Interpreting chemical equations | Developing understanding | 14–16 years

Deepen learners’ understanding of interpreting chemical equations by exploring the topic at different conceptual levels

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Dehongli hafaliadau cemegol | Datblygu dealltwriaeth | 14–16 oed

Dyfnhau dealltwriaeth dysgwyr o ddehongli hafaliadau cemegol drwy archwilio’r pwnc ar wahanol lefelau cysyniadol

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Concentration and mass | Developing understanding | 14–16 years

Encourage learners to deepen their understanding of concentration and mass from the macroscopic to sub-microscopic level

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Crynodiad a màs | Datblygu dealltwriaeth | 14–16 oed

Annog y dysgwyr i ddyfnhau eu dealltwriaeth o grynodiad a màs o’r lefel facrosgopig i’r lefel is-ficrosgopig

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Reacting ratios: masses | Developing understanding | 14–16 years

Develop learners’ understanding of the ratio of the very large number of atoms or molecules in balanced chemical equations