In case you need a quick guide to making a conference poster, here are two versions of my poster of poster tips. Just view them large, or display with a room projector and invite students to come up and read together. More details below the images.
Both posters are descendants of a document I created circa 1997 for my evolution students at Swarthmore College. The bottom one is available as a PDF if you want to print an actual poster of it — which I highly recommend if you are assigning a poster project for your class.
My full tips are at Designing conference posters. I created the website for my students, too, but eventually made it public in case it might help make the world’s poster sessions more enjoyable.