Congratulations–signing with your children is a GREAT decision! (See a great list of benefits here and here!) However, unless you grew up signing or you took American Sign Language classes in high school or college, it can be a tricky language to start learning.
Please note that Lone Star Signers uses affiliate links at no additional cost to you. I only recommend items that we have personally used and loved.
My favorite resource to start is the Baby Signing Time and Signing Time DVDs. I am a visual learner, so seeing the sign (versus reading a written description) is the best way for me to learn! You can check out these DVDs for free from your library or stream them digitally on your TV/tablet/phone with a monthly subscription to SigningTime.TV. (Tip: use the code sign99 at checkout to get your first month for just 99¢!)
Signing Time also sells books, flashcards, and posters on their website!
Another great resource for learning new signs is the Internet! We love to use lifeprint.com and signingsavvy.com to look up new signs. Signing Time has a great dictionary available on their website AND on their free app.
If you are looking for more advanced ASL resources for children older than age 5, stay tuned for the release of the NEW Signing Time Sentences coming later this fall! Several San Antonio area high schools and colleges also offer American Sign Language courses–I recommend you contact the department head for information about private lessons/tutoring.