1. Change the laws that tie public school funding to the number of enrolled students so that schools only take a modest hit if they see a large decrease in the number of students they teach.
2. Abolish compulsory education.
I bet within a decade, you'd even see non-asian minorities' test scores in the inner cities shoot up as 50% of the "students" just walk out and the school waves goodbye.
Sure, plenty of kids and teens would not get educated, but they're probably not get anything now either. You can't make a student that won't learn educated anymore than you can make a morbidly obese person who refuses to eat right healthy. Sometimes society is better off with such people being allowed to make themselves into warnings for others.