Centennial High
1,392
Students
16.6:1
S:T Ratio
School Snapshot
Key metrics at a glance36
A+
57%
B
17:1
B
This Week at Centennial High – June 18, 2026
182 students practicing on Varsity Tutors
Academic Resources
Typical courses and practice resources for students at Centennial High
Standardized Test Dates
Upcoming national, state, and school calendar dates that affect students at Centennial High.
National Tests
June 20, 2026 – July 4, 2026
SAT Score Release Date
June 23, 2026
ACT
June 24, 2026
ACT
July 1, 2026 – July 31, 2026
AP Score Release — All
July 6, 2026
ACT Photo Upload/Standby Deadline
July 11, 2026
ACT — National
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4300 Centennial Ln, Ellicott City, MD 21042
(410)313-2856
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Howard County Public Schools
Academic Calendar
Important dates, holidays, and school events