HOD has dc compile a portfolio of their work every year.
This is usually within a 3-ring binder with page protectors and tabs. In CTC on up, Student Notebooking pages are provided, thus upping the work (and the look) of the portfolio appropriately.
Both Carrie and I had to compile portfolios for our master's program, and portfolio-based assessment was a topic covered extensively within our master's program. Knowing portfolios were (and continue to be) the new form of assessment for many high schools, colleges, and upper graduate work, we decided to include them in HOD all along the way.
As far as counting credits, HOD will be explaining that thoroughly in its high school guides. HOD has plans in the works for this in the future.
If dc do CTC, RTR, RevtoRev, Modern Times guide (yet to be written) for high school instead of HOD's high school guides, these posts will be helpful:viewtopic.php?f=6&t=8208viewtopic.php?f=6&t=7240
Ways to beef up CTC for high school:viewtopic.php?f=6&t=5400
DITHOR Titles for High School:viewtopic.php?f=6&t=7765&p=56997#p56997
Does that help? Hope so!