Old Man and the C-

Old Man And The C- is the twenty-eighth episode of Season 7.

Plot
When Mr. Turner reveals he dropped off school at 5th grade, he attempts to graduate from Dimmsdale Elementary School to make his son proud.

Synopsis
Timmy's Dad enters the game show "Are You Brighter Than a 6th Grader?" and loses because he answered "sea cucumber" to nearly all of the questions. As the Turners left the set with the consolation prize: a lifetime supply of macaroni without cheese. Mr. Turner reveals he dropped off school when a nerdy kid named Melvin told him he was "too cool for school". Timmy asks his father if he could drop out school too, to which Mom refuses and makes Dad return to school. Timmy realizes his father is in his class, as he dropped in the 5th grade. Crocker sees that there are two Turners and throws two Fs at them. Mr. Turner avoids his, because he is set to graduate 5th grade to make Timmy proud. After he gives Crocker a box of macaroni as a gift, he becomes the teacher's pet, and he also befriends Elmer, Sanjay and Chester. When the four are going for ice-cream, Melvin (now a janitor) tells him he is still too cool for school, so Dad drops out of school again.

After some time, Mom tells Timmy that Dad will fail the year if he continues skipping school so Timmy goes with Crocker. They set up a deal. Timmy will give Crocker his macaroni boxes, and Crocker will let Dad do the Big Super Test, which lets you pass the year automatically. Timmy tries to convince Dad to take the test, but he thinks the test is too geeky for him. Timmy tells him that if his aim was to make him proud, then he was failing. So Mr. Turner decides to take it to make his son proud. This leads to a Rocky Balboa-esque montage where they study for the test. At the Dimmadome, the host of the game show will host the test. Dad is on a roll, answering all the questions the host asked him and some he didn't even ask him. When Dad is at one question of graduating high school, the final question is: which sea vegetable would suit perfectly on an undersea salad. Timmy tells Dad he trust him and that he knows, to which Dad shouts "SEA CUCUMBER!" and graduates. To celebrate, Timmy and his father toilet paper their own house and beat-up Melvin.