Trevor tries to convince Kyle to go to the police about Coach Perry's abuse in episode 2x09 "Update".
Source: What's Filming
Lara Jean goes to high school where during track practice she is mortified when realizes that all of her love letters were somehow mailed out.
Lara Jean third-wheels a date between Margo and Josh.
Betty gives Veronica a tour of the school on her first day in episode 1x01 "Chapter One: The River's Edge".
Source: What's Filming — Twitter