Mathematics is the queen of the sciences.
Carl Friedrich GaussExam Guides
Guides for Texas Credit by Exam, SAT and PSAT, AP and AMC — what is on each one, when it is sat, and how to prepare.
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Houston ISD CBE — Parent Guide: 80% Grade 1-5, Max 3 Credits/Admin, 2 Attempts/Subject (2026-2027)
Houston ISD (HISD) CBE lets K-12 students skip a class (acceleration) or earn course credit. Grades 1-5 require 80% on EACH of Language Arts / Math / Science / Social Studies. Max 3 course credits per administration and max 2 attempts per subject during HISD enrollment.
Midland ISD Credit by Exam — Parent Guide: 80% Free vs 70% Paid, Apply 30 Days Ahead (2026-2027)
Midland ISD runs two Credit by Examination tracks with different passing scores and different bills: 80% for acceleration, which the district pays for, and 70% with prior instruction, which the family pays for. The application is due at least 30 days before the test and needs four signatures. What a Permian Basin family needs before asking a counselor.
McKinney ISD CBE — Parent Guide: 80%/70% Passing, 3-HS Structure (2026-2027)
McKinney ISD Credit by Examination: 80% for acceleration (TEC §28.023), 70% for credit recovery (19 TAC §74.24). Registration through your campus counselor at McKinney HS, McKinney Boyd, or McKinney North. District Assessments office administers.
Carroll ISD Southlake CBE — Family Resource Guide: 80% Pass, UTHS-Only, District-Paid (2026-2027)
Carroll ISD Southlake CBE: 80% acceleration, 70% credit recovery. UT High School (UTHS) is sole vendor. District pays costs. K-8 grade skip; 6-8 math jump; HS untaken-course credit.
Cypress-Fairbanks ISD CBE — Parent Guide: 80% Pass + GPA/Class-Rank Impact (2026-2027)
CFISD Credit by Exam: 80% pass standard, three uses (accelerate graduation, make room for elective, credit recovery). Critical CFISD-specific rule: CBE grades and credit ARE used in GPA and class rank. 2-opportunity cap for MS students taking HS-credit CBE.
Lubbock ISD CBE — Parent Guide: 80% Pass + Local TTU K-12 Advantage (2026-2027)
Lubbock ISD Credit by Examination: 80% for acceleration, 70% for credit recovery. TTU K-12 vendor is headquartered in Lubbock — local advantage.
Denton ISD CBE — Parent Guide: 80% Acceleration, Counseling & Social Work Dept (2026-2027)
Denton ISD Credit by Exam / Exam for Acceleration: 80% for acceleration, 70% for credit recovery. Counseling & Social Work admin. Denton HS, Ryan HS, Guyer HS, Braswell HS.
Fort Worth ISD CBE — Parent Guide: 80% Pass, 2 Departments (CCR + G&T) (2026-2027)
Fort Worth ISD Credit by Exam and Acceleration Testing: 80% for acceleration, 70% for credit recovery. Two departments — College & Career Readiness + Gifted & Talented.
Frisco ISD CBE + EA — Parent Guide: 80% Mastery, Window A/D for Full-Year Courses (2026-2027)
Frisco ISD maintains CBE (prior instruction) and EA (Exam for Acceleration, no prior instruction) as two separate programs. EA requires 80% mastery. Full-year courses — Algebra 1, Geometry, Biology, U.S. History — are restricted to Window A or D. Parent-friendly guide.