Each child in a Montessori classroom is allowed to develop and advance in their own time at their own individual pace. This is one of the principles embedded deep within the Montessori method central to the philosophy.
If Montessori children seem to be more advanced compared to traditional expectations for their age level it is not because of pressured teaching or competition. Rather, it is a reflection of the vast possibilities and potential that children carry within them when allowed to learn at their own pace and pursue what is interesting to them during their sensitive periods of learning in a specially prepared environment.
The goal is to initiate the processes of logical thought and discovery internally.