Next up in the back-to-school posterpalooza, it's the order of operations.
I've heard different people have different opinions between GEMA and GEMDAS. I like the idea of arranging the letters like this as a compromise between the two. It emphasizes that multiplication/division and addition/subtraction occur in pairs, at the same time, but students will hopefully not forget about the division and subtraction.
Sarah designed the Grouping Symbols poster. I thought it'd be nice to have my order of operations posters match her style.