ocr: Previous and Next Buttons - Clicking these buttons will take you to the previous and next exercises within the current lesson. Metal Sphere - Click the sphere to get help on the exercises. Options Button - Click this button to access the Glossary; go to the main screen; turn the background sound /r music on or off; or quit program. Instructions Button - Click here for instruc- tions on how to complete the exercise. Lessons Button - Click this button to return to the lessons.
