Deb, take a long knife and insert it against the side of the pot. Just go around the pot, keeping the knife as close to the side-walls as possible. That will severe the connection of the roots to the pot's side-walls. Then take the heel of your hand and strike the sides of the pot all the way around. Invert the pot, holding one hand over the plant's base/potting soil, and thump the bottom of the pot until the plant/root-ball falls out.
to NGA/ATP.