Montessori has some really good educational methods and materials. But you need to be careful you are getting the real thing: a real Montessori school or real Montessori method. See what is sanctioned by the American Montessori Society or the Association Montessori Internationale or the North American Montessori Teachers’ Association.
Here are some videos on YouTube about Montessori:
a video (part 1) by a mother on how she uses Montessori at home (time 6 min, 32 sec)
a video (part 2) by a mother on how she uses Montessori at home (time 8 min, 12 sec)
children 0-3 in Montessori schools (time 5 min, 54 sec)
I picked these randomly; they are not necessarily the best. You can watch hours and hours of “related videos”…