> I'm struggling to understand how a summer before school spent on Khan Academy preparing you for "everything you missed" is somehow not possible for 1/5 kids to accomplish?
Some portion of these students will have passed their high school math classes and be unaware that they needed to prepare.
Some portion will not prepare even if they know they need to.
Some will not be well suited to self directed programs such as Khan Academy.
I took a quick look and saw that at least UCLA requires a math placement test or a high enough score on the AP calc exam in order to enroll in precalc or higher; perhaps the placement test needs work to better select classes for students.
Some portion of these students will have passed their high school math classes and be unaware that they needed to prepare.
Some portion will not prepare even if they know they need to.
Some will not be well suited to self directed programs such as Khan Academy.
I took a quick look and saw that at least UCLA requires a math placement test or a high enough score on the AP calc exam in order to enroll in precalc or higher; perhaps the placement test needs work to better select classes for students.