Lee's Summit Sr. HighSchool Calendar
2026-27 Academic Calendar
Key dates, holidays, and events for Lee's Summit Sr. High.
School at a Glance
Upcoming events & academic holidays2026-27 Academic Year
OCT
16
No School
No School (Prof. Development/Teacher Workday)
OCT
21
No School
No School - Parent/Teacher Conferences
OCT
23
No School
No School (Time Off for Night Conferences)
NOV
3
No School
No School (Prof. Development/Teacher Workday)
NOV
25
No School
No School - Thanksgiving
DEC
22
End of Second Quarter (42 Days) / End of Semester / No Late Start / Early-Release Day-Teacher Workday
DEC
23
No School
No School - Winter Break
JAN
3
No School
No School - Winter Break
JAN
4
No School
No School (Prof. Development/Teacher Workday)
JAN
5
Classes Begin
JAN
18
No School
No School - MLK Jr. Day
FEB
15
No School
No School - President's Day
FEB
26
No School
No School (Prof. Development/Teacher Workday)
MAR
19
End of 3rd Quarter (46 Days)
APR
5
No School
No School - Spring Break
MAY
26
Last Day of School / End of Fourth Quarter (45 Days) / End of Semester / No Late Start / Early-Release Day-Teacher Workday
Calendar TipEarly dismissal days and parent-teacher conferences are often updated 2 weeks in advance. Check back regularly to stay ahead of the schedule!
Standardized Test Dates
Upcoming national, state, and school calendar dates that affect students at Lee's Summit Sr. High.
National Tests
August 1, 2026 – November 30, 2026
ISEE — Fall Testing Season
Testing window
August 3, 2026 – June 30, 2027
SSAT — Flex Testing
Testing window
October 1, 2026 – October 30, 2026
PSAT 8/9 — Fall
Testing window
October 1, 2026 – October 30, 2026
PSAT/NMSQT — Fall
Testing window
October 1, 2026 – October 30, 2026
SAT — School Day - Fall
Testing window
October 16, 2026
SAT — National
Score release
State Assessments
September 14, 2026 – December 18, 2026
MAP-Alternate Assessment — MAP-A
Testing window
MO
February 1, 2027 – May 21, 2027
MAP-Alternate Assessment — MAP-A
Testing window
MO