Platte County High
#63
Best ACT in Missouri High Schools
1,330
Students
16.2:1
S:T Ratio
School Snapshot
Key metrics at a glance22
B
11
B+
39%
C+
16:1
B
This Week at Platte County High – July 17, 2026
183 students practicing on Varsity Tutors
Academic Resources
Typical courses and practice resources for students at Platte County High
Standardized Test Dates
Upcoming national, state, and school calendar dates that affect students at Platte County High.
National Tests
July 1, 2026 – July 31, 2026
AP Score Release — All
July 21, 2026
ACT
August 14, 2026
ACT
August 15, 2026
SAT — National
August 22, 2026
SAT — National
August 29, 2026 – September 12, 2026
SAT Score Release Date
State Assessments
September 14, 2026 – December 18, 2026
MAP-Alternate Assessment — MAP-A
February 1, 2027 – May 21, 2027
MAP-Alternate Assessment — MAP-A
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1501 Branch St, Platte City, MO 64079
(816)858-2822
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Platte Co. R-III
“The Mission of Platte County School District is to ensure our learners thrive in an ever-changing world with confidence and resilience, prepared to pursue their unique futures:”