Does anyone know the difference? My son is 4 and I'm thinking of starting him in school in the fall. I do not want to send him full time since kindergarten here is only 5 half days, and I am not ready to sacrifice that much time with him. Originally I was going to put him in a pre-k class twice a week, but most are full time or 5 half days. The one school I'm looking at has a 3 half day 4yo program, the director wasn't very clear on the difference between this and pre-k. She just said that he would benefit most from 5 days. I'm also tossing around the idea of keeping him home all together until kindergarten. Socialization is not an issue being that he has a ton of friends and he's starting tball in the spring. I'm going back and forth so I guess I was posting to vent and get advice. I work 3 nights a week so on those nights I sleep all day and barely see him, so I'm stingy with the time I do have with him. But I also want to do what's best for him and his future.