That's what I LOVE Whole Brain Teaching Power Pix.
On one large bulletin board I have a grid set up with A-G down the left hand side, and 1-6 across the top. I used simple dye cuts to make the letter and numbers, and this is how many would fit in my space. Inside this coordinate I put up Power Pix as the year goes on.
A Power Pix is a vocabulary word or concept that student should know all year long. Since I teach science, all of my Power Pix have a green border. ELA are usually blue, math are usually green.
Here is a Periscope that I did on Power Pix. Please leave a comment below if you have any questions!
Here is a link to a Google Drive presentation that contains several science Power Pix that I use.