I just signed up to by a varsity and jv boys Volleyball manager at my school. I need to know all of the information i can before the first game. I need to know how to take stats, and what to right in the volleyball score book.
Well, you’ve asked two different questions here. I’m not sure which scoring system your league uses, but here’s a website that shows how to take stats under the USAV system. This page has links to two tutorials that show how to keep score for non-deciding sets (the first 4 of a best-of-5 match, for instance) and deciding sets (the fifth set in a 5-game match. The scoring is different for that last set because the players switch sides at 8).
http://www.ncva.com/page.aspx?id=63
One big hint I’ll give you now: have a bunch of different colored pens or pencils for keeping book. It helps if you write the numbers in different colors every time the teams start their rotation over again (when the #1 server rotates back to serve again).
Basically you start by writing down the numbers of the players on the floor at the start of the game in service order. The coaches will give you their lineups on a grid that is 3 columns wide and 2 rows deep (6 boxes) that show you the starting players. You have to keep track of the score and the substitutions. A key part of scorekeeping is making sure the correct server is serving.
For stats, talk with your coach and find out exactly what s/he wants to track. The standard stats are kills (attempts, errors, and points), assists (# of sets that result in a kill), blocks, block assists, block errors, digs, service aces and service errors.
There are a TON of other things you can stat. I keep tabs of things like service efficiency, which tracks the number of serves a server makes during each rotation. I also stat the offensive efficiency by position — for my team, that’s so I make sure our setter is spreading the ball around effectively, and for my opponent I’m watching which sets they use most often so I can set my defense accordingly.
Have fun being manager! That job can be a total blast because you can be a real source of positive energy for your team. I had a couple of great managers over the years, and not only did they make my job as coach easier, but they were able to pump the team up.
This is me playing random stuff at 
Blake Hoffarber’s buzzer beater in the Minnesota State Championship game
Some heavy chick trying to serve in a international