Simple but effective resource - please rate! Three versions of connect-4 to encourage students to interact: 1) with percentages on the virtual board, where students convert them to decimals (or fractions); 2) with a random number generator and different rounding methods, where students try to round to the correct degree of accuracy; 3) create your own by adding a file named input.txt in the same folder with the desired text for the virtual connect four board. The coloured counter is placed if you pick a colour and click on the desired part of the board.

Notes and questions on energy, efficiency and specific heat capacity. Originally written for the AQA specification P1 (but transferable to other curricula). It includes the actual specific heat capacities of some interesting materials.

A short flash animation demonstrating how to bisect an angle with compasses. Can be played on the whiteboard to show each step clearly.