#3. "RE: End of year school portraits and class group shoot.." In response to In response to 2 Wed 12-Jun-13 06:19 PM by Omaha
Avoid having them look into the sun. It will make them squint.
If you don't have strobes available, then a basic reflector would be helpful to fill in the light on their faces (assuming you find a way to keep them from facing into the sun in the first place). That won't be of any use on the group shot, but it will help the individual shots come out.