Understanding most of the material is not enough to ace the class. Your child was doing ok last semester. They understood a lot in class and they were able to complete their homework, for the most part.
Understanding most of the material is not enough to ace the class.
Completing most of the test is not enough to ace it.
If your child misses 2 out of 20 problems on the test, that will often put them below the A level. Getting an A requires detailed preparation. Nuanced understanding of many variations of problems.
Why finishing homework can’t get your child further. Homework lacks the depth, necessary for “deep learning”. Homework gives your child a shallow practice of many types of problems. What your child actually needs is 3-4X problems from the specific 10% types THEY struggle with the most. They need to learn deep, not broad. To get to the A level, your child needs to focus on the top 10% hardest problems, their specific weaknesses, special cases and complex variations.