1. Discussion of how we can do two things at once sometimes, for example, lift both of our arms at the same time

2. As a class activity, using Scratch, program the Scratch cat to move 20 steps and say Hello

a. What do students notice about the order in which the cat does this? Does it move and speak at the same time? Or one after the other?

3. Discuss how students think that we would program Scratch cat to do this action at the same time by introducing the concept of parallel programming (doing multiple things at once)

4. Show the students how they could achieve getting the cat to move and talk at the same time

a. Get them to give it a shot on Scratch and see what other things they can program the cat to do at the same time

5. Now move on to thinking about Marty’s movements

a. Can we program Marty to do more than one move at a time? Any move or only certain ones?

b. Try and do these moves themselves (for example, do students think that they could lean to their left, put all their weight there and still kick their left foot?), highlighting limits of when we can use parallel programming

6. Ask students to try and experiment with parallel programming Marty, first of all by programming Marty to lift both arms up