Watch the The Hi Hat online guitar lesson by Danny Gottlieb from Master Class Drum Lessons
There are three basic hi hat foot techniques: the rocking method, opening and closing the hi hat with the foot down, and the way I normally play, with the heel up. Try each approach, and see what works best for you. The main thing though is to develop a great musical sound and control of the rhythms.
Major Points and Study Tips
1. Hi hat should close with good, controlled click sound
2. Hi hat jazz beat should really swing
3. Advanced students can practice more advanced coordination exercises - John Riley's drum set books can be used to develop the feet as well as hands