Last year I bought a Math intervention binder off of TpT. While it is totally awesome, it did not suit all of my needs or my students' needs. So, I came up with my own. These were super easy to put together once I came up with what I was going to do. I simply decide on the topic of the binder, then add various practice sheets and games about that topic.
I have several binders set up: alphabet, shapes, math, numbers, comprehension, number tracing, and letter tracing. You have seen pictures of the number and letter binders before when I talked about my inclusion box. Some pages I have made myself (such as the letter and number tracing pages), but I use a lot of pages by the Moffat Girls and then other various sheets I have. I like the Moffat girls because it is more than just tracing or writing. Annie Moffat includes a lot of games and activities in her No Prep packs. I put each sheet in a page protector so the sheets can be re-used. Each binder is organized a bit differently. The alphabet binder is more of a mix, where the shapes binder is organized by shape. I also add a zipper pouch or resealable bag (just put duct tape on the edge to make it durable before you hole punch it) to the front that I can store dry erase markers, an eraser, dice for games, game markers, etc in.
Now, we just grab a binder and use it to practice these skill at any time. I find this great for when we have an extra 5 minutes or I end up with an extra person that can work with someone individually. The kids think it is neat because they can write on the page protector and it just wipes off.
Just an extra note that the Learning Ahoy caddy next to all the binders holds clipboards, extra markers, erasers, etc.