Vassar's grades were an issue in HS. You are referencing the Vice article -
"But at the same time his recruiting was ramping up, Vassar's grades were dropping. After Vassar had differences with his head coach—he says his coach forced him to go on a visit to Indiana with his team rather than a scheduled visit to Illinois—Cherise pulled her son out of La Lumiere, and homeschooled him to get his academics in order.
"He wouldn't be (an academic NCAA) qualifier if I left him there," she said."
That said - he has done fine academically at NU - so may have just been a blip.
That, and the VICE article was an absolute piece of garbage.