K.N.
I'll second the Tomorrow Montessori. My daughter is in the preschool there, she was previously in the Toddler Room. My son was there for both preschool and kindergarten. He went directly into 1st grade, although that seems to depend on individual schools, and birthdate of the child. I wasn't trying to push him, but it was nice to have th option of kindergarten, since he missed the cut off by 3 months.
They are open from 7am to 6pm, very convenient.