I would like to add my opinion. If you know that the school has kind, giving, loving, enthusiastic, motivated, knowledgeable, experienced teachers with 4 year olds, then it can be a valuable learning experience. The learning should be through games so that it is natural. Children at 4 years of age ned to be active, not sit still looking at a book for long periods of time. The school has to use interactive games with movement, maybe arts and crafts,too to develop small motor skills like cutting papaer with scissors. And if they use healthy fruits and vegetables and juices as snacks in the teaching, all the better. Food helps children feel a part of the lesson.