hmmm. i'm guessing if this said в школе it would've been 'at school'. weird how в can be 'at' or 'to'.
It depends on the the case that the noun is in. в with prepositional case denotes location (in, at) and в with accusative case denotes direction of movement (to, into). So в школе, which uses the prepositional case, would mean that she is running in or at the school.
My translation should be accepted "Vera is running into the school," if not, then how would you translate "Vera is running into the school" in Russian?