"Cindy"

5 Pullups
10 Pushups
15 Squats

As many rounds as possible in 20 min
Post rounds and reps for partial rounds to comments

Check your form!
Pullups - Chin over the bar
Pushups - Body straight from heels to head, drop chest or nose to the floor or until arms are at 90 degrees, rep is complete when elbows lock out.
Squats - Try to get your legs parallel to the floor. Arch your back and stick that butt out!