Self Paced Mastery

Yes, the Khan Academy program adjusts itself to what the student knows through a feature called "Adaptive Practice". When a student answers questions correctly, the program will gradually increase the difficulty level of the questions, while incorrect answers will prompt easier questions until the student demonstrates mastery.

In addition, the program allows students to skip sections or topics they already know by giving them the option to take a pretest. If they pass the pretest with a certain score, the program will automatically mark that topic as mastered and move the student on to the next one. However, it's important to note that some topics may have prerequisite skills or concepts that need to be learned before moving on, so it's recommended to work through the pretests to ensure a solid understanding of the material.