The school records thing doesn't look like much of a play by the prosecution either.
One of his instructors, now a JAG, said "Hi George" to him with a smile when asked if his student (described as excellent and earning an A) was in the classroom and proceeded to once more make the prosecution look idiotic by going through the details of what constitutes legitimate self-defense, and that "degree of injury" isn't relevant, indeed that the whole concept is to react to the threat to -prevent- serious injury. Which undermine's the prosecutions "he over-reacted" to the beating angle.
The DNA was, as expected, a non-player due to the rain and lack of collection (due to the lack of evidence it wasn't self-defense).
So the prosecution is down to Trayvon's mother as a weeping witness, then they rest. It looks like they aren't going to call the actual medical examiner who did the actual autopsy on Trayvon? They called an assistant who wasn't involved in the initial case to give her opinion about photographs but like the rest of the prosecution witnesses didn't deliver anything meaningfully conclusive.