Early on in my teaching career I was asked to teach Physical Education. Now keep in mind that I was taught in the university how to teach elementary education, not physical education. Two different ballgames.
Regardless, I tried to teach many international students softball, T-ball, basketball and flag football. This is what I had grown up with and was most comfortable teaching.
My years as a paratrooper were not really suited for the younger students.
It was not until my first school actually got a certified physical education teacher that I realized that I did not know diddley about teaching PE.
Hopefully these websites will help you.
Physical Education Lesson Plans, Elementary PE Activity, Worksheets, Teaching Lessons
Instructional Materials in Physical Education