Yes.
3 yrs old = 2 hours 3 mornings/week at a very child-centered nursery school with a 1:1 ratio Early Childhood Ed. students to young children with 2 lead teachers overseeing the ECE students.
4 yrs = 3 hours every morning (M-F) at a much too academic teacher-centered Catholic school ... because that area didn't have any other option that I could afford (she began to hate school!)
4.5 yrs = we moved back to my parents' & she was in a great play-based PreK 4 hours/day with 1:6 child:adult ratio, which she loved
I would have been OK with her going to Kindergarten there if they had TAs + smaller class sizes, but it's about 1:25 teacher

s for 6 hours everyday

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