I&T: Infant and Toddler (birth through age 3)
EC: Early Childhood (ages 2 1/2 through 6)
EL I or EL I-II: Elementary I (ages 6 through 9) or I-II (ages 6 through 12)
SI or SI-II: Secondary I (ages 12 through 15) or I-II (ages 12 through 18)


Three levels of accreditation are listed:

• Initial Accreditation (IA) is granted for a maximum period of four years (through the year indicated), and may be extended to a maximum of seven years upon submission of a satisfactory Interim Report at the end of the third year of operation.
• Full Accreditation (FA) initial or renewed, for a maximum period of seven years (through the year indicated).
• Accreditation with Stipulations/Probation (AS/P) Deficiencies have been identified by the Commission, and must be corrected by the year indicated in order for the institution's/program's Full Accreditation status to be restored.
• Distance Education (D) MACTE accredits institutions offering certification course components via distance that meet specified criteria.  An on-site residential component is required.

Title IV Certification

Free-standing accredited institutions/programs that have been certified through the U.S. Department of Education to offer Title IV funding (federal grants and loans) to their students are starred and in bold print in the directory listings. Many of the programs located within colleges and universities also offer Title IV funding to students (these are underlined)


Organizational Affiliation

Many accredited institutions/programs are affiliated with Montessori societies, organizations, consortia, or groups of independents. Affiliations are indicated next to the name of the program (with acronyms in parentheses), and may include: