3 Year Olds Problems at PreSchool?

Separation Anxiety is a common problem among toddlers, and can even last to as old as four or five. The best thing to do, although it might sound a little mean, is to just drop him off, and reure him that you'll be back. You said that you increased his hours and this may b stressful for him, being away from his parents for so long. So one thing you could do is give him a transitional object, and that usually helps. But when you drop him off, just be strong, he'll cry a little bit, but he'll see all the fun the other kids are having and'll join in.