Boulder Country Day Photo - Our small class sizes provide individualized attention for each preschool student. There is truly a personal relationship that develops between the children and their teachers. Our knowledge of each child's strengths and goals helps teachers to meet individual needs. Classrooms are organized by age and are class sizes are well below State of Colorado Division of Childcare ratio guidelines.

Best Colorado Private Schools Belonging to International Baccalaureate (IB) World School (2026)

For the 2026 school year, there are 3 private schools belonging to International Baccalaureate (IB) World School serving 1,141 students in Colorado. You can also find more schools membership associations in Colorado.
The top-ranked private schools belonging to International Baccalaureate (IB) World School in Colorado include Boulder Country Day, International School of Denver, and Mackintosh Academy Boulder.
The average acceptance rate is 57%, which is lower than the Colorado private school average acceptance rate of 84%.

Top-Ranked Private Schools Belonging to International Baccalaureate (IB) World School in Colorado (2026)

School
Location
Quick Facts
Boulder Country Day
Boulder Country Day Photo - BCD is a proudly independent institution serving students 2 years old - 8th grade. In partnership with our outstanding faculty and committed families, we uphold the highest standard for our educational experience. Through small class sizes and innovative engagement in a supportive environment, students at BCD learn to explore their strengths and apply them to the world.
(13)
4820 Nautilus Ct N
Boulder, CO 80301
(303) 527-4931
Gr: NS-8 | 293 students Avg. class size: 16 students Sports: 4 | Extracurrculars: 7 Tuition listed
International School of Denver
International School of Denver Photo
Special Program Emphasis
(10)
7701 E 1st Pl, Unit C
Denver, CO 80230
(303) 340-3647
Gr: PK-9 | 684 students Avg. class size: 13 students Sports: 7 | Extracurrculars: 32 Tuition & acceptance rate listed
Mackintosh Academy Boulder
(4)
6717 S. Boulder Road
Boulder, CO 80303
(303) 554-2011
Gr: K-8 | 164 students Avg. class size: 18 students Sports: 1 Tuition & acceptance rate listed

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