2nd Day of teaching, volleyball 1st period.

Yesterday, I hope you saw two things over the course of the day. One, most classes have a unique personality, which is exacerbated even more with the different lab days. Second, how you teach a lesson at the end of the day may be markedly different than the beginning of the day.
Normally, we hit towards the dividers, to avoid an aerial assault on the middle of the floor. I like that you changed that, with the presence of the net, for court awareness reasons.
Good correction to remind the students to continue to drill with two hands and not one.
Some of the breakdowns in skills can be helped by merely having the students move closer.
It is a good idea to have the students catch a bad ball, when drilling, so they don't emphasize bad habits when hitting.  There is a time to practice bad ball hitting, I don't know if it's 9 grade PE.
As you get to know the kids, you can use a mature, skilled student to sometimes assist special needs students,  They may even relish the role.