So if you were given absolute power of the US's education system and curriculum, what would you do?
Be honest now.
Mandate that all schools be secured against violence.
Mandate proper dress codes, including teachers.
Class size limited to 20 students
Change seating arrangement from rows to circular.
Expulsion of troublemaking students.
Weekly instruction in citizenship (aud format).
Assign student-to-student mentoring.
Eliminate all homework.
Mandate more shop and trades courses.
Place the same importance on trades as is placed on college.
Give academic credits to students who work summer jobs or do community volunteer work.
Mandate substantial personal individual interaction between students and teachers.
Mandate broad exposure to activities, crafts, travel, technology, careers, jobs, etc.
This would be a good start.
Edit.
I would like to add social and recreational activities to the curriculum as well. Many kids see others doing things they will never have the opportunity to do. Many parents and teachers see some kids enjoying these activities and assume that all kids do as well. This of course is false. Kids need a broader base of experience than is available to many, especially poorer kids.
I also would require "get to know your fellow students" programs, where every student would meet every other student and interact with them on a productive basis sometime during their matriculation.
I would also plan formal chaperoned events where students would be assigned their escorts/dates. This would be voluntary and participants would receive 'social studies' credits.
'Whole person' development is sadly lacking in American schools. I would change that.