2nd-5th grade Volleyball Unit

All of my 3rd-5th grade classes at this time of the school year are working on volleyball skills.  The main skill for all classes will be the underhand strike/serve.  Once I have taught all of the skills, the students will start their games.  The 2nd/3rd grades will play with the beach ball and the 4th/5th grades will play with the regular ball.  If I feel the 3rd grades are doing a good job with the beach ball, I will move them to the regular ball the last class.