Have students move so they have room to use the edge of their chair. Have each student grip the edge of chair with legs extended out in front of the chair. The student will then lower their body down toward the ground, (keep back close to the chair edge) while bending at the elbows, lower down until elbows are approximately 90 degrees, then straighten elbows while bringing the body back up to starting position. A good example to explain this activity to students would be to pretend they are scratching their backs (from bottom to top on the way down and top to bottom on the way up) against the edge of the chair, their back however should not actually touch the chair edge, but be very close.
Wheelchair push-ups or use a chair with arms rests and pressing arms straight. Bend knees and use legs to help support.