Simulations

Things you can pull, drag and break. Each simulation works on a phone and maps to a topic in the school science & maths curriculum.

Energy of Reactions

run a reaction and watch heat flow out or in as the thermometer rises or falls, seeing what exothermic and endothermic mean.

break a number down branch by branch until every leaf is prime, and see its unique prime factorisation appear.

enter two numbers and see the shared primes make the HCF and all the primes make the LCM, with the product rule falling out.

type any measurement and see which digits are significant and which only hold the place, with the reason for each.

combine two measured values and see why the answer cannot be more precise than the roughest input.

build the dimensional formula of each side of an equation and see whether they match, catching a wrong formula early.

type mass, moles, or number of particles and watch the other two update, with molar mass and Avogadro number doing the work.

set the amounts of two reactants and watch which runs out first, how much product forms, and what is left over.

drag elements between two sets, pick an operation, and watch the matching region shade live with the result set listed.

see the same set as a listed roster and as a rule in set-builder form, with each number lighting up if it belongs.

drag two charges, change their signs and sizes, and watch the force grow, shrink and flip as the inverse-square law plays out.

place positive and negative charges and see the electric field drawn as field lines or an arrow grid.