Pre-K

My 4 year old started pre-k yesterday. He had never gone to day care and I can count on one hand probably how many times in a year he was babysat. My husband and I agreed to give the program at Maple Ave school a try. Our biggest issue is that the Niagara Falls School system runs the program as a full day class just like all their other classes. Although we know that he needs to start with the formal learning, as kindergarten is not what it use to be, we both had hoped for a more gentle introduction. If we lived just a few miles north in Lewiston we could have him in a half day class. I know that it is going to take a while for him to adjust. Today he told me he doesn't want to go to school Wed because he misses me.

Is it normal for him to come home and tell us that he can't remember anything that he did that day? He's been in school two days and doesn't know any other kids names. I know he is outgoing because when we would go to the playground this summer, he would introduce himself to any kids that were there and ask them to play. I worry though. He's not smiling when we pick him up. Is it too much?