Precise and accurate facts and figures are difficult to determine, as Montessori schools operate as independent entities or as members of a patchwork of organizations. The following numbers are estimates; sources and assumptions are given below.
schools 4,000-5000 22,000
children 6 and under 120,000 to 150,000 700,000
children 6 and older 35,000 100,000
Education in the United States (for comparison)
public 99,000 (including high schools)
pre-K (3-5 years old) 8,250,000
pre-K through 8th grade:
total pre-K through 8 41,660,000
Sources: AMI, NAMTA, AMS, MontessoriScout, and the NCES. School size was estimated at 30 6-and-under students per school, and 50 6-and-older students per elementary program. Elementary enrollment is based on a very rough guess of 700 elementary programs. Several surveys which are currently underway should provide better numbers in the coming year or so.