What are some singing techniques to improve head voice and to take belt higher?

My low notes are getting really strong, but I can only belt moderately high, and my head voice notes are airy even when I think I'm supporting them.

pianoman2020-04-09T01:19:19Z

This is not a teaching site. You need a voice teacher to work with you one on one.

chicken2020-04-09T00:19:49Z

My daughter (17) has a voice coach. She is not very expensive. I pay her 50 dollars for a one week session which last 2 hours.