Great Mills High
1,779
Students
19.4:1
S:T Ratio
School Snapshot
Key metrics at a glance29
A+
22%
C
19:1
B-
This Week at Great Mills High – May 30, 2026
242 students practicing on Varsity Tutors
Academic Resources
Typical courses and practice resources for students at Great Mills High
Standardized Test Dates
Upcoming national, state, and school calendar dates that affect students at Great Mills High.
National Tests
May 16, 2026 – May 30, 2026
SAT Score Release Date
June 5, 2026
ACT
June 6, 2026
SAT — National
June 8, 2026
ACT Photo Upload/Standby Deadline
June 13, 2026
ACT — National
June 20, 2026 – July 4, 2026
SAT Score Release Date
School Milestones
May 15, 2026 – June 12, 2026
Graduation
June 4, 2026
School End/Summer Start
June 17, 2026
School End/Summer Start
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21130 Great Mills Rd, Great Mills, MD 20634
(301)863-4001
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St. Mary's County Public Schools