Classroom painting and debates

My creative nature doesn't just exist within the confines of my home. It extends to my classroom now too. The admin team at my school gave the okay to paint my classroom for several reasons

1) I am a new teacher, so my room should be my own 

2) Others in my department have their rooms painted so there should be some continuity

3) I teach US History, not state history so some of the items on my walls don't exactly make some sense..

 

There are several of these around the room...

So it's been a debate for me as to whether not no to paint over them. Some of my friends say to start fresh and paint it all. Others say it looks cool, so keep it. And other remind me that Native Americans are a huge part of US History. 

While I decide, I did so some general work on the remaining wall space. 

The earth tones were not chosen by me! The school provides the paint so that there is consistency throughout the school. As you can see, I taped off the Native American artwork. Of all the ones in the room, my administrator has said he would prefer I keep the large one pictured above. My plan for that one at least is to buy some crown molding, cut it to size and hang it like a frame. That way the face seems like a hanging painting instead of an actual painting on the wall.

What thoughts are there about the rest of the room? Paint over the tribal artwork or keep it? Side note: the reds and blues in the two sets of art work don't go together. As in different shades entirely...