Class Size Information

  • As part of our commitment to communication and transparency in the district, we annually publicize information regarding class sizes in the Mercer Island School District.

    The elementary class size ratio reflects the average class size by grade level (average class size student ratio to 1 teacher), as delineated below: 

    Elementary Class Sizes (Headcount as of 10/1/17)

    KindergartenGolden Island Park Elementary

    20.5 to 1 – Kindergarten

    20.0 to 1 – 1st Grade

    23.7 to 1 – 2nd Grade

    21.3 to 1 – 3rd Grade

    24.3 to 1 – 4th Grade

    23.3 to 1 – 5th Grade

    Lakeridge Elementary

    17.3 to 1 – Kindergarten

    22.3 to 1 – 1st Grade

    26.0 to 1 – 2nd Grade

    22.2 to 1 – 3rd Grade

    26.0 to 1 – 4th Grade

    26.7 to 1 – 5th Grade

    Northwood Elementary

    22.7 to 1 – Kindergarten

    21.7 to 1 – 1st Grade

    17.3 to 1 – 2nd Grade

    22.4 to 1 – 3rd Grade

    23.0 to 1 – 4th Grade

    25.3 to 1 – 5th Grade

    West Mercer Elementary

    22.3 to 1 – Kindergarten

    22.0 to 1 – 1st Grade

    20.0 to 1 – 2nd Grade

    23.7 to 1 – 3rd Grade

    24.5 to 1 – 4th Grade

    26.5 to 1 – 5th Grade

    The secondary class size ratio reflects the average class size by subject area (average class size student ratio to 1 teacher), as delineated below:

    Islander Middle School Average Class Sizes (10/1/17)

    35.0 to 1 – Music

    28.0 to 1 – PE/Health

    26.8 to 1 – Math/Science

    27.4 to 1 – Language Arts/Social Studies

    06.5 to 1 – Special Programs (Special Ed, ELL)
    29.0 to 1 – World Language 

    Mercer Island High School Average Class Sizes (10/1/17)

    30.0 to 1 – Music

    25.8 to 1 – English/Social Studies

    25.6 to 1 – Math/Science

    24.9 to 1 – World Languages
    06.4 to 1 – Special Programs (Special Ed, ELL)
    28.3 to 1 – PE/Health
    25.0 to 1 – Career Education