Trapped inside on a snow day, the Yellowjackets revisit the highlights, humiliations and traumas of “Health Class.” Tai and Van help each other kindly rewind, Misty explores joining a classic Cosmic American tribute band, Lisa helps Natalie carp the day, and Shauna gets a pop-quiz on her cookie-reading assignment.

• Ashley Lyle
• Bart Nickerson

• Samantha Hanratty
• Lauren K. Robek
• Jeff Holman