Below are a list of documents and websites that are worth investigating to improve your referee skills:

Facebook group providing support and guidance to female AYSO referees
https://www.facebook.com/groups/622428462075997/?ref=share

The Laws of the Game (LOTG)

2023-24 IFAB Laws of the Game – English
2023-24 IFAB Laws of the Game – Spanish
2023-24 LOTG Changes Summary

The Laws of the Game App

2023-24 IFAB Laws of the Game - Apple
2023-24 IFAB Laws of the Game - Android

The Referee section of FIFA.com

FIFA Refereeing

The Referee section of AYSO

AYSO Refereeing

AYSO Online Referee Training Courses

These are accessed through the AYSO 599 website after you've logged in.  See instructions HERE

The Referee section of USSF

https://www.ussoccer.com/referee-program

Ask The Ref – There is a large forum with user submitted questions that are answered by experienced referees.  Just about any question you can imagine has been asked and replied to already.  This is a great source of information if you have a question regarding a specific in-game scenario.

http://www.asktheref.com/