Hundreds, tens and units Animation Play

Hydrogen bromide addition to propene Animation Play

In Antarctica and in the desert Whiteboard exercise Play

Interesting fact Animation Play

Interesting facts about the calendar Whiteboard exercise Play

Interesting facts about the calendar Student activity Play

Irrational numbers – addition and subtraction Whiteboard exercise Play

Lenna's shopping Whiteboard exercise Play

Long addition Animation Play

Long addition and subtraction Animation Play

Lorry Simulation Play

Markovnikov’s rule Student activity Play

Mechanism of nucleophilic addition Whiteboard exercise Play

Mechanism of nucleophilic addition Student activity Play

Mechanism of the addition reaction Animation Play

Mental addition Animation Play

Mental addition Whiteboard exercise Play

Mental addition and mental subtraction Student activity Play

Mental calculations involving multiplication Whiteboard exercise Play

Mental calculations involving powers Whiteboard exercise Play

Mental methods Whiteboard presentation Play

Mental methods Class activity Play

Mercury and lead Whiteboard exercise Play

Money calculations Student activity Play

Money calculations – reckoning Student activity Play