Grades and recs.
That said - my kid's private did not share grades in a typical way. We worked with the school registrar in order to get a transcript with actual percentage points and GPA value. They have the info, but it was just not shared in their portal or on report cards. DCPS will otherwise assign a point value to alternative systems such as P+/P/F; I recall seeing this online somewhere but not sure where, but perhaps the staff at myschoolDC could help.