Would like to know how primary school teachers know or suspect that a child has nits/lice? I have 3 kids and can only tell if they have the eggs by closely inspecting i a strong light and then trying to pull away the suspect egg (in case it's something else - eggs stick to the hair whereas dandruff comes away). I have never seen adult lice moving or otherwise in the hair. I have seen lice in the nit comb however during a lice treatment. So how do teachers spot them? thanks.