Request #93

Hi! I am looking for a book a read a lot as a teen that has not travelled with me in my many moves. It was published in the 80s, I believe. It’s about a girl who is a freshman in high school and wants to be a cheerleader. She has red hair, and older sister, and her family writes on their kitchen table. She likes a boy from another school. There’s a passage I remember when they were sitting on a couch and trying to figure out what it was, the conclusion was naugahyde, and she might have had a friend named Marcy. The cover is a girl jumping in a cheer uniform.
Thanks in advance! I know it wasn’t a fever dream….looking forward to seeing if anyone else read it, or knows what it is!  The Rah Rah Girl By Caroline Cooney identified by Lost Classics reader trinaclem