What is an "assault" rifle? The definition varies quite a bit around the world. What I normally see is that any rifle that has a wood stock is a "hunting" rifle and anything with a metal or plastic stock is an "assault" rifle.
According to your definition an AK-47 is thus a "hunting" rifle ?
DISCLAIMER: I am not into guns, don't need them ...
Besides, Tramp wants to arm teachers, listen Duck, watch this: https://www.youtube.com/watch?v=0rR9IaXH1M0&feature=youtu.be&t=5m5s
Next, a depressed teacher shoots at the kids, then, NRA will say: Let's arm the school kids as well! Then, a teacher gives a numpty a C and the numpty says: "My AK-47 in my schoolbag tells me this is worth an A+!, thank you in advance!"