Current Class Size Information

As we commit to a higher level of communication and transparency in the district, we will publicize the most up-to-date information regarding class sizes in the Mercer Island School District annually. 

The elementary class size ratio reflects the average class size by grade level (average class size student ratio to 1 teacher). 

Elementary Class Sizes (Headcount as of 10/1/11)

Island Park Elementary

19.8:1  Kindergarten

21.8:1  1st Grade

24.0:1  2nd Grade

19.8:1  3rd Grade

25.3:1  4th Grade

25.3:1  5th Grade

Lakeridge Elementary

24.7:1  Kindergarten

21.4:1  1st Grade

24.0:1  2nd Grade

23.5:1  3rd Grade

25.8:1  4th Grade

25.5:1  5th Grade

West Mercer Elementary

23.5:1  Kindergarten

25.0:1  1st Grade

25.3:1  2nd Grade

22.0:1  3rd Grade

25.8:1  4th Grade

24.9:1  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 (10/8/11 FTE*)

31.3:1  Music

26.3:1  Electives

26.8:1  Math/Science

28.4:1  Language Arts/Social Studies

  9.9:1  Special Programs (Special Ed, ELL)

Mercer Island High School Average Class Sizes (10/8/11 FTE*)

36.6:1  Music

28.4:1  English/Social Studies

28.3:1  Math/Science

22.7:1  Electives

10.5:1  Special Programs (Crest, Special Ed, ELL)

Class size information for the 2008-2009 school year is available here.

We have also provided a historical Average Elementary Class Size graph for Mercer Island School District for 1994 through 2009 by grade level.

*FTE = Full Time Equivalency