Writing algebra and substitution

This contains 3 resources: 1) Algebra literacy starter match up powerpoint (project); understanding equation / term / expression / formula. 2) I think of a number activity word document (print) - 3 quick questions looking at algebra notation / writing algebra. The point of this is to identify any misconceptions before moving into substitution. 3) Making your own substitution questions - 3 slides. The first to be projected; value is given in the centre with various questions around it (answers available). The other two slides are differentiated, one easier (positive value) and one harder (negative value). Students should write their own questions and answers. They can swap their questions and work on each others questions, then peer assess.