This is a complicated little tool for building custom schedules based on requests. The tool is intended to support something like a a "What-I-Need" block or "Extra Help" sessions or perhaps choice options on a Field Day.
Features:

• Allows scheduling as many activities over as many days as you like (e.g. 4 options for field day or 20 workshops over 10 days -- whatever)
• Allows limiting attendance at any event to a number of your choosing.
• Allows multiple competing streams of information (e.g. pre-assigned schedules + high priority requests + lower priority requests).
• Generates schedules automatically and provides feedback on why each person was scheduled where they were (e.g. if someone didn't get their request because of a limitation, it says so to help you troubleshoot)
• Helps you manage the many sheets it generates to keep this more usable.
• Allows emailing participants the schedule automatically.
• Supports scheduled automation.