.KeyCode 3 Lesson Select. KeyCode 3 - Unit 1KeyCode 3 - Unit 2KeyCode 3 - Unit 3KeyCode 3 - Unit 4KeyCode 3 - Unit 5KeyCode 3 - Unit 6KeyCode 3 - Unit 7KeyCode 3 - Unit 8KeyCode 3 - Unit 9KeyCode 3 - Unit 10