@poohbear thanks so much for the videos! The tension in my neck also causes headaches (almost every other day sigh). I just tried the lacrosse ball video and I already feel better. Thanks!!!
YOGA! Especially cat and cow poses! Also, watch your posture during tests and avoid slumping.
http://www.chopra.com/articles/6-yoga-poses-to-help-relieve-neck-pain#sm.00001elxi6fm78cyjutbf51o0k8ar