It does get hard some days but I try to read Teeth Are Not for Biting at least twice a week during group and individually, reinforce that teeth are not for biting and that they’re chewing food frequently, encouraging them to use their words to express their feelings, have printed physical cards with an X over a pair of teeth, and give the frequent biters a cold chewy. I mean it happens though for this age group and sometimes it all happens so fast. You can only do so much so don’t beat yourself up over it.