A-G Validation Rules
C+
For incoming freshmen · UC & CSU
Skipped a course? Got a D?
Here's how validation works.
When a student passes a higher-level course in math or a language other than English, UC and CSU presume they learned what the courses below it taught — even if a lower course was never taken, or ended in a D or F. Here's how the rule works, and where it stops.
Type 1
Subject omission
A lower-level course was never taken. A passing grade in the next course up fills the gap, and the missing course is no longer counted against the student.
Example: A student who never took Spanish I earns a C in Spanish II. Spanish I is validated. Only Spanish II counts toward A-G course totals.
Type 2
Grade deficiency
A lower-level course ended in a D or F. A passing grade in a higher course clears the subject requirement — but the D or F stays in the GPA.
Example: A D in first-semester Algebra II is validated by a C in second-semester Algebra II. Both grades still count in the GPA.
Where validation applies
UC & CSU Mathematics and languages other than English only. These are the two subjects where knowledge builds in sequence.
CSU Also lets a C- or better in the second semester of chemistry validate the first semester.
History, English, other sciences, arts and electives cannot be validated. A D in English stays a D.
The passing grade that counts
UC A C or better in the higher-level course. For high school courses, a C- is treated as a C.
CSU A C- or better in the higher-level course.
UC & CSU Even a single semester of higher-level work can validate: the second semester of any math or language course validates the first semester of that same course.
How math validation flows
Precalculus, Calculus, other advanced math validates everything below
validates
Algebra II / Math III
validates
Algebra I / Math I
Geometrynot validated by
a higher course
a higher course
A higher rung validates the rungs beneath it in the algebra sequence. Geometry sits outside the chain.
The geometry exception
UC & CSU A skipped geometry course cannot be validated by Algebra II, precalculus or anything higher. Only the second semester of geometry can validate a missing first semester.
UC A D or F in geometry could be validated by a higher math course only if that course was finished by summer 2026; higher courses taken fall 2026 or later no longer do. UC will accept a school-administered geometry challenge exam if the transcript shows a letter grade and credit. SAT, ACT, AP and IB scores cannot validate geometry.
CSU Algebra II, statistics and data science validate algebra but never geometry.
How language validation flows
Level 3 or 4 validates every level below
validates
Level 2 validates Level 1
validates
Level 1
Any higher level of the same language validates all lower levels. CSU A C- or better in the second semester of Level 2 satisfies the entire language requirement.
Statistics & data science
This is where the two systems differ:
UC Starting with coursework taken in fall 2026, statistics and "additional math" courses no longer validate Algebra II or Math III. They still count as an extra year of math.
CSU Statistics — and data science courses carrying the statistics discipline — do validate Algebra I and Algebra II. Neither validates geometry.
What validation does not do
- It does not erase a D or F from the GPA. Both the low grade and the higher course grade count. Only repeating the course replaces the grade.
- It does not add courses to A-G totals. A validated-but-skipped course is not counted; only the higher course is.
- It does not excuse reporting. Students must still list the D or F on the application unless the course was repeated.
How it happens
UC Applied automatically during application review, based on the course disciplines on the school's A-G course list. Nothing extra to submit.
CSU Cal State Apply validates courses automatically for California high schools with a UC A-G list. Non-California schools, or courses not on the list, go through a manual validation step inside Cal State Apply.
Middle school math and language courses can be used toward the requirement and are typically validated by high school coursework; their grades don't enter the GPA.