I'm not sure if 'Tribal Theme' is the politically correct title here so if there's a better one to be used please let me know. Generally, the feeling behind a Tribal Themed Classroom is one of aiming high, moving forward, targeting goals, etc. You can use any color theme but the main visual that you must see is arrows. A few paper fans are great too. Here are some examples below.
Arrows everywhere! Arrow fonts on arrow cut-outs, and even the border is made of arrows. I love these positive words used: focus, discover, believe, explore, learn, achieve, create, and grow.
Adventures await bulletin board. I love the fans.
The tribal decor traditional area rug is not too busy and really beautiful. I also like this tribal medallion area rug for the classroom.
Below are items from my TpT Tribal collection.
More ideas will be added soon.