I use this ppt to teach my students greater than, less than, and equal to. I also use alligator mouths with magnets attached on the back to let them use when I am first teaching the concept. I got mine from the Crazy for First Grade blog. I copied these into Office and added a text box to each that said greater than and less than (you will have to flip one). I also found a cute graphic (don't remember where) that was an alligator carrying an equal sign. This ppt helps teach the concept and also had slides that the students can practice the concept.