AP/IB or Dual Enrollment Community College Diploma

In state public universities are likely to be more generous with dual enrollment credit associated with same state community colleges (but with some exceptions, such as University of Michigan being stingy even with Michigan community colleges).

They are also more likely to have articulation listings for same state community colleges so that prospective students can tell what community college courses count (or do not count) for what course or requirement (particularly important for transfer students, but useful for dual enrollment high school students).