How do students who miss science make it up?
When Andy misses a day, have him team up with Reggie and Kelly (who did very well with the activity) and Jacques (who will definitely benefit from second tour through the activity). Let the more accomplished students teach the activity to those who missed out for one reason or another the first time through. Some activities can be taken home. If the parents are ready for it, package a set of equipment, copy the step-by-step page from the teacher guide, and let the home study begin. You can also point the student toward FOSSweb for on-line activities and resources that relate to the investigations he or she may have missed.