Complete story — includes the ending
Marcia is anxious about her freshman year of high school, and Mike asks Greg to introduce his sister around. Marcia decides to join every club at school, including the Boosters, a club of conceited girls who administer strict social rules. When Marcia invites the Boosters over for her interview, Peter's previously malfunctioning science project model volcano, which is the subplot, finally erupts, spewing "lava" over Marcia and the outraged Boosters. Marcia breaks into laughter and realizes the humorless Boosters are not the types of girls she wants to socialize with. She subsequently quits all the other clubs, except for ceramics, the only one she truly wanted to be in.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, List of The Brady Bunch episodes. HTML formatting and reference markers removed. · Content license