The Lyons Township High School Class of 2011 matched the highest composite ACT score in school history, racking up an average composite score of 24.1 and equaling the mark set by the class of 2009.

The state average composite ACT score was 20.9 and the national average was 21.1. The LTHS Class of 2010 had an average ACT composite score of 23.8.

The Class of 2011 also matched all-time school high scores on the math, reading and science sections of the test and had the second best mark in school history on the English portion of the test, according to a press release issued two weeks ago by Lyons Township High School.

The average math score was 24.4, equaling the mark set in 2009. The average reading score of 24.0 and the average science score of 23.5 also matched the schools highest marks, which were set in 2009. The average English score of 24.0 fell just short of the school record 24.1 average score set two years ago.

The ACT is scored on a scale on 1 to 36 and is a curriculum-based achievement test that is designed to serve as measure of the of a student’s preparation for first year college course work.

LTHS serves the southern portion of Brookfield as well as LaGrange, Western Springs and parts of several other communities. 

All public high school juniors in the state of Illinois are required to take the ACT as part of the Prairie State Achievement Exam.

Riverside-Brookfield High School officials said that they would release their school’s average ACT score and other test results in October at a school board meeting. Test results are published in the school report card issued by the state Board of Education in the fall.

A recent in-depth study of college readiness by ACT indicated that RBHS graduates’ first-year grades at Illinois public universities were slightly below the state average while LTHS graduates first-year grades were slightly above average.

ACT looked at the drop-off in grade point averages (GPA) from high school to the first year of college from 2006 to 2008 in what it called its High School-to-College Success Report.

RBHS graduates who attended Illinois public universities had an average high school GPA of 3.10 (slightly higher than the statewide average of 3.08) and an average first year college GPA of 2.49 (just below the statewide average of 2.52).

LTHS graduates who attended Illinois public universities had an average high school GPA of 3.10 and an average first year college GPA of 2.58.

However, among students who attended the state’s flagship public university the University of Illinois at Urbana-Champaign, RBHS graduates slightly outperformed their LTHS counterparts, earning an average freshman GPA of 3.33 compared to 3.22 for the average freshman GPA for an LTHS graduate.

This superior freshmen GPA performance at the University of Illinois for freshmen from RBHS occurred despite them having a slightly lower average composite ACT score of 28.1 compared to the 28.6 of their LTHS counterparts.