This excel file gives 2 lists of numbers, one labeled a and one b, we are told that they are directly proportional and students have to work out how to get from a to b, the constant can be hidden and shown, and new sets can be generated. The next sheet is the same except for indirect proportion.

Nothing fancy here, just a settler, 5 pictures to estimate length, could be followed up by a discussion on how people estimate or what could be considered a sensible estimate.

The idea here is that each slide is put onto a card and students have to sort them into two groups true or false. For every false card students must draw an example of it being false (counter example). This is my first resource going up here, please be nice.