Summer School

Students can take a variety of classes during the summer. If you are interested in in Summer School, please understand that students must reside in District 155 boundaries and meet other requirements in order to be eligible for enrollment. With the exception of driver’s education courses, all summer school courses will be held at Crystal Lake South High School located at 1200 McHenry Ave, Crystal Lake, IL 60014. The main office number is (815) 455-3860. Driver’s education courses meet at the student’s home school.

A variety of special education courses and programs are offered during the summer.​ Information regarding Extended School Year-Special Education will be mailed to families after spring break.​ 

Any student who plans to attend summer school—including students with an IEP—should contact the student services department at his/her high school and register as soon as possible. Student services offices in all District 155 schools are open every weekday from 7 a.m. to 4 p.m. during the school year, and from 7 a.m. to 3:30 p.m. (Mon.-Thur.) or 12 p.m. (Fridays) during the summer. Please note: The way these courses are presented may change due to COVID restrictions. 

Summer School Registration

Priority will be given to those who register first unless noted in the class description. Registration begins on March 6, 2023, and deadlines are:
First Semester: April 21, 2023
Second Semester: May 26, 2023

Summer School Registration Packet - English

Summer School Registration Packet - Spanish

Send your registration to your school’s student services department.

Students are not confirmed in a course until all fees have been paid online through Skyward Family Access which will be added once the paperwork has been received.

First Semester (May 23 - June 9, No Classes May 29)

Second Semester (June 12- June 30, No classes June 19)

Early Elective Registration for Summer School 2023

Early registration is only available for the following courses.

Semester One (May 23 - June 9, No Classes May 29)
Consumer Education
U.S. History
Visual Art and Technology

Semester Two (June 12- June 30, No classes June 19)
Consumer Education
U.S. History

Dates are subject to change due to winter weather closures during the regular school year.

Early registration begins on January 24, 2023 for select courses. For early registration, all fees must be paid by February 24, 2023 to secure a student's spot in class. Regular registration for other summer school courses will begin in spring 2023.

early elective summer school information - english

Early elective summer school information - spanish

Class Credit 

Unless otherwise noted, a ½-credit may be earned from successful completion of each semester of summer school coursework. Students may repeat courses they have previously passed, with the higher of the two grades entered on their permanent record. However, the student will only receive credit for the course once. Regardless of the course, all students must be present for the final exams.

Book Rental

Tuition fees cover the rental of textbooks, while required workbooks and any other supplementary supplies must be purchased by the student. Books will be distributed the first day of class and must be returned on the last day. Students are expected to return the books in the same condition as they were received. Students will be charged for lost or damaged books. No academic credit will be given until all textbooks are returned in acceptable condition or are paid in full.

Please note: This page contains links to documents that are in Adobe's PDF format.  If you have accessibility needs that make it difficult for you to access and / or interpret information in PDF format, please call 815-455-8500 or email, and we will be happy to assist you. 


Crystal Lake South High School
1200 South McHenry Ave
Crystal Lake, IL 60014 
Phone: (815) 455-3860

Summer School Tuition & Fees

All courses: 
One semester tuition $180 
Two semesters tuition $360 

Course-Specific Fees: 
Visual Art and Technology $15 Supply Fee (plus $180 semester tuition)

*Note: There is a $15 late registration fee for all registrations received after the deadlines.*

Daily Class Schedule

Period 1 - 7:30 - 8:20 a.m.
Period 2 - 8:25 - 9:20 a.m.
Period 3 - 9:25 - 10:20 a.m.
Period 4 -  10:25 - 11:20 a.m.
Period 5 - 11:25 a.m. - 12:20 p.m.


Bus service to Crystal Lake South High School is provided at no charge to students from Cary-Grove High School, Crystal Lake Central High School, and Prairie Ridge High School. The bus schedule is as follows: 

Cary-Grove (front of school) to Crystal Lake South
Leave at 6:45 a.m. 
Return to CG by 12:55 p.m. 

Crystal Lake Central (front of school) to Crystal Lake South
Leave at 6:45 a.m. 
Return to CLS by 12:55 p.m.

Prairie Ridge (front of school) to Crystal Lake South
Leave at 6:45 a.m. 
Return to PR by 12:55 p.m.