Serving 19 students in grades Kindergarten-8, Calder School ranks in the bottom 50% of all schools in Idaho for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is ≤20% (which is lower than the Idaho state average of 41%). The percentage of students achieving proficiency in reading/language arts is 21-39% (which is lower than the Idaho state average of 55%).
The student-teacher ratio of 6:1 is lower than the Idaho state level of 17:1.
Quick Facts (2026)
- Grades: Kindergarten-8
- Enrollment: 19 students
- Student-Teacher Ratio: 6:1
- Overall Testing Rank: Bottom 50% in ID
- Math Proficiency: ≤20% (Btm 50%)
- Reading Proficiency: 21-39% (Btm 50%)
- Science Proficiency: <50% (Top 30%)
- Source: National Center for Education Statistics (NCES), ID Dept. of Education
Top Rankings
Calder School ranks among the top 20% of public schools in Idaho for:
Category
Attribute
Community Size
Student Attention
School Overview
Calder School's student population of 19 students has declined by 17% over five school years.
The teacher population of 3 teachers has grown by 50% over five school years.
Grades Offered
Grades Kindergarten-8
(No virtual instruction)
(No virtual instruction)
Total Students
19 students
Gender %
Total Classroom Teachers
3 teachers
School Calendar
Last Day of School
Mon. May 25, 2026
School Rankings
Calder School ranks within the bottom 50% of all 704 schools in Idaho (based off of combined math and reading proficiency testing data).
The diversity score of Calder School is 0.00, which is less than the diversity score at state average of 0.43. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#657 out of 704 schools
(Bottom 50%)
(Bottom 50%)
Math Test Scores (% Proficient)
≤20%
41%
Reading/Language Arts Test Scores (% Proficient)
21-39%
55%
Science Test Scores (% Proficient)
<50%
41%
Student-Teacher Ratio
6:1
17:1
American Indian
n/a
1%
Asian
n/a
1%
Hispanic
n/a
20%
Black
n/a
1%
White
100%
73%
Hawaiian
n/a
n/a
Two or more races
n/a
4%
All Ethnic Groups
Eligible for Free Lunch (20-21)
78%
25%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), ID Dept. of Education
Frequently Asked Questions
What is Calder School's ranking?
Calder School is ranked #657 out of 704 schools, which ranks it among the bottom 50% of public schools in Idaho.
What percent of students have achieved state testing proficiency in math and reading?
≤20% of students have achieved math proficiency (compared to the 41% ID state average), while 21-39% of students have achieved reading proficiency (compared to the 55% ID state average).
How many students attend Calder School?
19 students attend Calder School.
What is the racial composition of the student body?
100% of Calder School students are White.
What is the student-teacher ratio of Calder School?
Calder School has a student ration of 6:1, which is lower than the Idaho state average of 17:1.
What grades does Calder School offer ?
Calder School offers enrollment in grades Kindergarten-8 (No virtual instruction).
What school district is Calder School part of?
Calder School is part of Avery School District.
School Reviews
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