Facilitator Icons

Working on a set of concept icons for a facilitator guide. The icons are intended to serve as cues for the facilitator as they train using the student manual.

Top row:
- System Functionality
- System Features
- Quiz
- Timed Student Activity

Bottom Row
- Lecture
- Hands-on Activity
- Instructor Information
- Group Activity

Looking for feedback/ideas on how to improve each concept. Thoughts?