Flash questions
Short drills on core skills, drawn at random each time you open one. A wall of cards to project, print or run as a timed slideshow — answers stay hidden until you ask for them.
All series shuffled togetherA wall drawn from the whole catalogue: each card comes from a different series, with no warning.Open the shuffle Mental maths challengeAs many maths questions as you can in 1 or 5 minutes, against the clock.Start the challengePhysicsHigh school
SI units
Matching each physical quantity with its SI unit, recognising the symbol and recalling the name behind it.
Open the wall
PhysicsHigh school
Physics and chemistry formulas
The formulas from the syllabus, both ways: recalling the formula for a quantity, and saying what a formula computes.
Open the wall
What are flash questions for?
A flash question is answered in seconds, in your head. Strung into a short series, they keep sharp the basics — times tables, fractions, conversions, formulas — that longer exercises already assume. Every wall is drawn afresh: the same series never comes back identical, unless you keep its address.