Toolkits
Deep dives on the ideas that show up everywhere. Each one starts with why the idea exists at all — the problem it was invented to solve, what it actually does, and where it turns up outside a classroom — and then goes through it properly: the full explanation, the table you actually need, worked examples, and the mistakes that cost marks.
Every unit
Designing a fair test
Manipulated, responding and controlled variables, spotting the unfair design, repeats and odd results, and reading a graph — the skill behind many of the PAT's skills questions.
Open the toolkit
Electrical principles
Volts, amps, watts and the power bill
Ohm's law, power, energy and efficiency as one chain that ends in what an appliance costs to run, with the unit trap at each link.
Open the toolkit
How to use these
- Wondering why any of this is a thing? Read the opening section. It is the part a textbook usually skips.
- Stuck on a question type? Open the toolkit for that idea and find the worked example closest to it.
- Revising? Read the tables and try the checks, then go to practice questions to see whether it stuck.
- Getting ready for the achievement test? Every Grade 9 student writes it in June. The printable worksheets and a mixed quiz are the closest thing here to sitting it.