There are three different classes in Big Brain Academy, test, practice and versus. These can be accessed as soon as you've registered a profile.
- Test: The test consists of one randomly picked activity from each of the five categories. Each activity takes 60 seconds. At the end of the test you'll be given a brain age, brain type and grade. Grades range from A+ to F- and are displayed next to your name in the homeroom.
- Practice: Practicing lets you work on activities at steady pace. It can improve you at activites where you're having trouble. Each activity has three dificulty levels: easy, normal and hard. You can get medals in each of these activitys and levels.
- Brain Weight: 050 Medal: Bronze
- Brain Weight: 150 Medal: Silver
- Brain Weight: 250 Medal: Gold
- Versus: You can compete against friends to see who has the biggest brain. Questions are asked and the first player to guess corectly gets 10 grammes added onto their brain weight. If you miss a question, the game subtracts grammes from your score. The first to reach 300 grammes is the winner, other you can set a different target weight. The results screen will show who is the winner. This mode is for 2-8 players only.