DS (3) just completed his second week in preschool whose teachers have Montessori training but the school follows the Reggio philosophy (it goes thru 8th grade). He attends 3 days/week 3 hours/day. The preschool class is combined ages 2.5 to 4.5. There are 2 lead teachers and 3 assistants. 44 children are currently enrolled but all kids are not there each day. They offer three and five day options, and if you select three, you can pick which days your child goes. I selected T, W, F because of the special 30 minute classes offered on those days. M-art, T-Mandarin, W-Spanish, Th-Library, F-double header with gym and music (by a Suzuki-trained instructor). DS loves it.