Simplify the following text for a Grade 10 native English-speaking person.
Original: After that , the couple started to teach Leah sign language , first with Signing Exact English ( SEE ) , then with American Sign Language ( ASL ) , so that they could learn to communicate , becoming good signers .
Simplified: Afterward , the couple began to teach Leah sign language , first with Signing Exact English ( SEE ) , then with American Sign Language ( ASL ) , so that they could learn to communicate .