At NALL and Little Leagues across the world the Scorekeepers are one of the most important officials at the ball field. Keeping the book doesn't mean that they only keep the score, they need to know the actual rules of baseball and for the division of play they are scorekeeping. They keep many vital stats that not only assist with knowing the score of the game, but some of the stats they keep assist with player safety as well , like keeping the pitchers pitch count.
In the Tee Ball Division scorekeepers help to make sure that every player has equal participation. No score is kept.
In the Farm Division, scorekeepers keep an unofficial score to know when a offensive team scores 5 runs in an inning. Similar to Tee Ball, they make sure that the player reaches their minimum requirement (Player must play 2 innings in the infield).
In the Minor Division on up, the scorekeeper is tasked to do more, they not only keep the score, but they also keeps count on how many pitches are thrown by a pitcher, how many innings a catcher is behind the dish, substitution of players, and minimum play requirements. Often a manager will ask the scorekeeper on the pitch count during the game.
All teams are required to have a scorekeeper for each game. The home team is required to have two scorekeepers as they will keep book in their team book and in their leagues official book.
The earlier you start to learn to score keep a game, the easier it will be to learn the new aspects of each division. If you start when your ball player is in Tee Ball or Farms it will be easier for you to learn the nuances of the minor, major and junior division as your ball player rises through the divisions.