Lessons & Letters is the fifteenth episode of A High School Rockstar. It aired on July 14, 2012 in a special week, together with Pastries & Paybacks.
Tyler and Jennifer are surprised with a not so warm welcome on their first day of school at Miami Senior High. After getting a letter from an unknown source, Zac assumes it's a love letter for Tyler and the guys stop at nothing to find his secret admirer. Meanwhile, Jennifer is invited by a teacher to an after school lesson. The group are in for a surprise when they accompany Jennifer and realize that the lesson they're in for is not a normal kind of lesson.
- Ross Lynch as Austin Moon
- Laura Marano as Ally Dawson
- Raini Rodriguez as Patricia Maria "Trish" De La Rosa
- Calum Worthy as Dezmond "Dez"
- Stefanie Scott as Lexi Reed
- Spencer Boldman as Aaron Moon
- Jack Griffo as Tyler Fox
- Garrett Backstrom as Zac Helm
- Anna Marie Perez De Tagle as Jennifer Mane
- Zoey Deutch as Samantha Bennett
- Valorie Hubbard as Ms. Donna