We love The Lighthouse (on SMUD's campus). It's not cheap though. We pay $950 a month now for out son (2.5 year old). it goes down though as they get older.
The Pond (toddler class) goes through 3 AND potty trained (he and several others are trained/training now) then on to pre-school. The Pond is like pre-preschool... an organized day, circle time, art projects, music etc., and more academic stuff for the ones who are interested. Our son knows all of his letters and their sounds, numbers 1-15, days of the week etc... but different kids are at different places depending on what they are into.
We really have loved The Lighthouse because all the staff in every class make an effort to know all the children at the school. Our son feels very loved there, he still likes to make regular visits to his old teachers in the infant room. It's all the love of an in home, but all the things that made us put him at a "school" as well. We know a couple of families with older children (2nd, 5th, and 7th grades) who all went to the Lighthouse. They are all very well mannered, well adjusted children and have excelled socially and academically.
T.