Your purchase comes with the document pictured above. The document encourages kids to choose their own problems, allowing more freedom. I posted the solutions, along with the work, so kids can check their own problems and find their own mistakes. This is great if you have a a class that benefits from movement breaks, and also builds the skill of error-checking.
You may choose any problems you want, in any order you want. You should choose the figures you need practice on first, the only way to get better at a skill is to practice! The solutions to the problems are posted around the room; when you have found the area and perimeter of the figure check your answer on the wall and make corrections if necessary.