A portfolio submission usually impresses admissions officers at these non-traditional schools. Portfolios do present difficulties. This is particularly true at some large state colleges and universities. Portfolios can make the job of reviewing candidates so onerous that admissions officers at some larger institutions will simply suggest that the student apply elsewhere. Additionally portfolios run the risk of being rejected by the occasional admissions officer who tries to ft the portfolio data into the list of recommended college preparatory high school courses.
Reports also indicate that portfolios are more likely to baffle junior college admissions personnel.
Consider writing a home-brew master transcript. Put materials and documentation into a familiar format. Write course descriptions. Recount high school homeschooling on their terms. A transcript makes it easy for colleges to understand and categorize your student according to their criteria.