This wonderful website is the work of Susan Stephenson, a highly-regarded Montessorian. The website gives useful information on the Montessori approach and there are beautiful Montessori materials available. The catalogues they produce are a great resource themself, “The Joyful Child” for children 0-3 years and “Child of the World” for children 3-12 years.
Both these websites offer a wide selection of Montessori materials and useful child-sized materials such as wooden trays, glasses, and aprons.
Located here in the Netherlands, Nienhuis is an educational supplier of Montessori materials
I like the craft materials available at Rolf’s website. Again an educational supplier, but also allows orders from individuals
Interesting blog posts about the Montessori approach.
An online shop in Australia run by experienced Montessori teacher Ruth Barker. Lots of great Montessori toys for your home