As a mom of 2 adult kids and a lousy student I under stand all sides . I would have been exstatic to have gotten that card.
If fact my grades were so bad that mom said getting my drivers license and just the douplima was good enough. (may have had something to do with the terrible school we had too)
Thats why I homeschooled my kids they each had speacil talents . one was so far a head for their age , the other the oppisite But together we managed to get all through it and now they have to make the choice to get their GEDs . I think you deserve a atta girl for bringing those grades up. But also maybe they know you can do more and better.