Or ceramic tile? I'm assuming they're linoleum (or early vinyl). Heather, you can speed the process with an old iron and terry cloth towel (you probably won't want to use either of these items for personal use again.) Put the toweling on top of the tile you want to pop, and set the iron on top of that (no steam). When the glue is good and sticky, scrape that sucker off with a wide blade putty knife.