Mark T. Sheehan High School
#3
Best ACT in Connecticut High Schools
722
Students
10.4:1
S:T Ratio
School Snapshot
Key metrics at a glance1,200
A-
31
A+
24
A+
28%
C
10:1
A
92%
A+
55%
B
25%
C
This Week at Mark T. Sheehan – June 4, 2026
92 students practicing on Varsity Tutors
Academic Resources
Typical courses and practice resources for students at Mark T. Sheehan High School
Standardized Test Dates
Upcoming national, state, and school calendar dates that affect students at Mark T. Sheehan High School.
National Tests
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
June 23, 2026
ACT
School Milestones
June 4, 2026
School End/Summer Start
June 11, 2026 – June 17, 2026
Graduation
June 11, 2026
School End/Summer Start
After Mark T. Sheehan High
Where graduates go and what they studyUniversity of Connecticut
Southern Connecticut State University
Quinnipiac University
Central Connecticut State University
University of New Haven
University of Rhode Island
University of Hartford
Boston University
Psychology
Nursing
Biology
Business
Mechanical Engineering
Marketing
Computer Science
Physical Therapy
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142 Hope Hill Road, Wallingford, CT 06492
(203)294-5900
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Wallingford School District
Academic Calendar
Important dates, holidays, and school events