Our school is going through a "heads up for head lice", too. Here are a few websites that I found helpful:
http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7446.htmlhttp://www.headlice.org/www.liceknowingyou.com
The best remedy that folks seem to have come up with (and studied at Harvard even), is covering the head with oil (coconut oil works well) and then donning a shower cap. Leave on for at least 2 hours, or overnight - then shampoo. I would add a few drops of tea trea or cedar or citronella oil to the shampoo, too.
Clothes should be removed the minute he arrives home from daycare and dropped in a plastic bag or the washer. Coats go into the dryer for 30 minutes on high heat. Bed linens get washed every other day until the lice danger has subsided.
Use diluted tea tree oil (or cedar or citronella) as a repellent - rub a little through his hair before school. You only need a drop in a tsp of carrier oil. A little goes a long way. Tea tree oil is powerful stuff and not to be applied full strength to kids.
These are the major points - let me know if you want more info.
Good luck!
Melissa