From the walkthrough:
Section 12: Carol 1. To begin you must first increase your relationship with Carol at recess by answering the questions correctly until your relationship no longer improves. The max relationship you can get through recess is 15.
a. WARNING: It's highly recommended that you at least get to the point of where Carol see's you and Rachel in the bathroom stall before you complete maxing your relationship.
2. Once you have raised your relationship to 15 wait until Monday of the next week (if it is already Monday when you hit 15 you won't have to wait.) On Monday after recess, Ms. Turner will assign a book to read and a group project. You will be assigned to work with Carol. a. When you exit school Carol will be waiting for you and you will talk with her. b. In your inventory you will have a workbook for the school project, use it, do it before it is Friday or you will fail and your story line with Carol will end.
3. The next day after you've read the book go to school and you will talk to Carol in class.
4. In the afternoon, visit Carol at her house. Carol lives at house number 6 in New Neighborhood.
a. WARNING: If Carol did not see your penis in the toilet when you were trying to find the location of Beth's party, Do not go to Carol's home. Make sure to find out about the party first.
b. WARNING: visit Carol before Friday or you will fail and end the storyline with Carol
c. When she leaves the room go to her PC on the desk she left and activate her webcam
d. Go to the bathroom to speak with her then watch the scene.
5. Wait until it is Friday, the teacher will give the grades for your project. When leaving school Carol will be waiting for you outside. From now on you can have dates with Carol. You also will now be able to visit Carol at home. See Appendix A and Appendix E for dating Carol and home visits. This ends the Carol quest. a. When you raise your love up to 1500 or above through home visits and/or dating, if you speak with Carol at recess she will have sex with you in the bathroom at school.