Lice sucks, I agree with the comb hair often, and check hair.
Do not agree with the wash often approach. (Unless you already have it) Lice like clean hair, if it's oily and dirty, it's harder to stick too. So here kids hair is washed once per week.
tee tree oil is amazing. We spray it, mixed with water on girls hair, in the am, while I'm putting it in a pony tail and then braiding it.
I would never send my girls to school, without their hair back.
Funny story, my dd age 4, told her best friends Mom, while Mom was there reading to kids.. Her dd, must have head lice, cause it's never in a pony tail.. My kids hate, getting their hair done every morning. It takes about 15 min, per two kids. I tell them, it has to go back if not, the will catch the lice..
I guess dd, now thinks every girl who doesn't have a pony tail has headlice. I've tried to explain to her the difference.. But hey, if it makes her keep her hair back at school.. That is great!!