Google provides its own training courses to prepare you for the Level 1 Exam. I will suggest modules to complete along with your weekly modules to prepare you for the exam. 

These are not required but suggested in order to prepare you for the type of questions you will see on the exam. They are not categorized by Google Tools, but rather by skills such as digital citizenship, working collaboratively online, or communication. 

You will need to sign in with an active Google account. I suggest using your school email address.