Strictly speaking, you can't change the score of a lesson once you have answered all the questions. You can change answers, but the original score will remain.
If you have not finalized a lesson and still have questions to answer, you can resume and finish the CALI Lesson. This will change the final score of the lesson. You are also able to take CALI Lessons as many times as you wish.
Please note: if you are taking a LessonLink CALI Lesson or an AutoPublished Lesson, your professor will be able to see multiple lesson runs. For more information on resuming a lesson, LessonLink or AutoPublish, please see their respective questions in the FAQs.