An important component of Criterion A is your research plan. This is a chance for you to identify the questions that you need to answer in order to be able to create the solution to the problem.
Now that we have a (very basic) understanding of Scratch, we need to start thinking about what this unit is really about and how you will be able to solve the problem of creating an educational game for elementary students. What questions do you have about the project? What questions do you need answered and where will you get those answers?
Check out this help sheet (originally published by the MYP) to get you started.