Word Walls in Third Grade

I'm wondering how other third grade teachers handle all the words we teach. I have multiple word walls up in my room. I like the idea of my content words being grouped according to unit or theme. I think this helps students connect certain words. Here is my social studies words to know board. I have it set up like a tree map with topic specific words falling under each branch.
We play "Search and Find" or "Twenty Questions" with these words as you would with any word wall. Kids have to know these words to do well on state tests so we refer to them as often as we can.

Here are my "No Excuse" words for writing. They are the trouble makers as we like to call them. My kids are taught to use this reference to check spellings. If I find these words misspelled on papers, it goes right back to the writer with NE written in the margin by the line that includes the mistake. It's about accountability, kids!

This final poster of words are our "JUICY" words. We follow CAFE and are always on the look out for pizzazzy words when we read. This poster is pinned to my blinds and is right next to my reading chair - hey, I use any space I can get! We gather here for shared reading or read alouds. I like to have them up close to me. The sheet of paper has been blocked into squares for each letter of the alphabet. When we get to a great word, we write it on the post it along with a kid friendly definition and stick it onto the appropriate square. My kids really used this poster during writing time to make their sentences sparkle!
So how do you handle word walls in your room? I'd love to hear!!