Standardized Testing
Dexter Southfield School Code: 220262
Students are responsible for sending scores to colleges as needed.
Test Optional Colleges
Dexter Southfield Recommended Standardized Testing Calendar
2025-2026 Academic Year
CLASS 12:
Optional Fall School Day Testing at Dexter Southfield
SAT School Day Testing (Digital): Wednesday, October 8, 2025, 8:15 a.m.
ACT School Day Testing (Paper/Pencil): Tuesday, October 14, 2025, 8:15 a.m.
CLASS 11:
Optional Fall School Day Testing at Dexter Southfield
*Note: On Wednesday, October 8, 2025, Class 11 students have the option of taking either the PSAT/NMSQT or the SAT.
PSAT/NMSQT (Digital) Wednesday, October 8, 2025, 8:15 a.m.
SAT School Day Testing (Digital): Wednesday, October 8, 2025, 8:15 a.m.
ACT School Day Testing (Paper/Pencil): Tuesday, October 14, 2025, 8:15 a.m.
Optional Spring School Day Testing at Dexter Southfield
*Note: On Tuesday, April 7, 2026, Class 11 students have the option of taking either the SAT or ACT.
SAT School Day Testing (Digital): Tuesday, April 7, 2026, 8:15 a.m.
ACT School Day Testing (Paper/Pencil): Tuesday, April 7, 2026, 8:15 a.m.
New this spring, the Enhanced ACT Test will be administered for the first time on campus, and students have the option of testing with or without the science section. Learn more about the new Enhanced ACT Test here. Registration for both tests opens in early January 2026 through the College Counseling Office.
Class 10:
At-Home Digital SAT and ACT Diagnostic Testing
(virtually proctored by Advantage Testing)
ACT Diagnostic Testing: Monday, June 1, 2026, 9:00 a.m.
SAT Diagnostic Testing: Tuesday, June 2, 2026, 9:00 a.m.
*Class 10 students are strongly encouraged to take both the SAT and ACT digital diagnostic tests at home.
AP Testing at Dexter Southfield
Week 1: Monday, May 4–Friday May 8, 2026
Week 2: Monday, May 11–Friday, May 15, 2026
AP Exam Schedule
Standardized Testing Schedule (Off-campus)
SAT Testing (Digital)
Saturday, August 23, 2025 (Registration Deadline: August 8, 2025)
Saturday, September 13, 2025 (Registration Deadline: August 29, 2025)
Saturday, October 4, 2025 (Registration Deadline: September 19, 2025)
Saturday, November 8, 2025 (Registration Deadline: October 24, 2025)
Saturday, December 6, 2025 (Registration Deadline: November 21, 2025)
Saturday, March 14, 2026 (Registration Deadline: February 27, 2026)
Saturday, May 2, 2026 (Registration Deadline: April 17, 2026)
Saturday, June 6, 2026 (Registration Deadline: May 22, 2026)
Register for SAT Testing
ACT Testing (Digital or Paper/Pencil Options)
Saturday, September 6, 2025 (Registration Deadline: August 1, 2025)
Saturday, October 18, 2025 (Registration Deadline: September 12, 2025)
Saturday, December 13, 2025 (Registration Deadline: November 7, 2025)
Saturday, February 14, 2026 (Registration Deadline: January 9, 2026)
Saturday, April 11, 2026 (Registration Deadline: March 6, 2026)
Saturday, June 13, 2026 (Registration Deadline: May 8, 2026)
Saturday, July 11, 2026 (Registration Deadline: June 5, 2026)
Register for ACT Testing
Test Prep Companies to Consider
Although not specifically endorsed by Dexter Southfield, the companies below are known to serve many Boston-area students who are applying to selective colleges and universities.
- Advantage Testing (Newton and Concord)
- Applerouth Tutoring Services (Virtual)
- Academic Approach (Newton)
- Inspirica (Wellesley)
- Kaplan (Various locations in MA)
- Livius (Lexington and Newton-Wellesley)
- The Princeton Review (Various locations in MA)
- Quintessential Tutoring (Lincoln)
- Signet Education (Cambridge)
- Summit Educational Group (Waltham)
- Test Innovators (Virtual)
Free Online Test Prep Resources