Here's my version of a Math Reference Guide! I use this in several places in my classroom: pasted into math notebooks, as an attachment in Google Classroom, and as a giant poster on my wall. Your school's or office supply store's poster printer can make a really large version for posting onto the wall. This wall chart is frequently used during small group instruction. During whole group instruction, my iPad is connected to the projector, so I use the camera app to zoom-in to a specific area for easy reference.
This math reference contains content relevant to grades 3-5.
If you find other ways to use my math reference guide, please share! :)