Pupils needing extra support

Should use the Resource: Polling program image; could watch the start of the Teacher video: Variables.

Pupils working at greater depth

Could be challenged with the following ‘What if’ questions:

• What if there were no instructions under ‘on start’? (The program would not know the starting value for each variable.)
• What if we changed ‘set [variable]’ to 5? (It will start the count on 5, adding 1 each time the button is pressed.)
• What if we changed ‘change [variable]’ to -1? (The program would start on a minus value meaning that the total would not be the actual amount of times pressed.)