Thanksgiving brings Kitty's parents, Eric's sister Laurie and Kelso with a date---Eric's math teacher, who has just failed Eric.

When the gang get their SAT results back, Eric freaks out when he discovers he got the lowest score of the group. As a result, he goes to some drastic measures when he starts to study to retake the test. Later, Eric accidentally lets it slip to the gang that he and Donna are engaged.