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 – July 26, 2026
98 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
August 7, 2026
SAT — National
August 11, 2026
SAT — National
August 14, 2026
ACT — National
August 22, 2026
SAT — National
August 28, 2026
SAT — National
September 1, 2026
ACT — National
State Assessments
February 1, 2027 – May 28, 2027
Next Generation Science Standards Assessment — NGSS
March 1, 2027 – April 30, 2027
Connecticut SAT School Day — ELA & Math
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