What should Education under a Leftist system look like? The current system obviously doesn't work as can be seen by the large amounts of dropouts and general scorn and dissatisfaction that is directed towards the system.

I'm personally leaning towards the Sudbury Model of Education, essentially the government, school, and parents have no say in what is taught (preventing bias and the brainwashing type of education in modern public and religious schools).
The school's rules as well as other actions are decided by a democratic "School Meeting" consisting of Staff members and the entire Student Population, each has an equal vote and the staff possesses no veto power. Meaning that the school is mostly run by the students, there is no curriculum and no classes, the students decide what to learn, how to do it, and can ask other students or staff for assistance if they wish.
There are no divisions by age or skill meaning that younger students can interact with older ones at will and vice versa, allowing for older students to act as big brothers/sisters to younger students giving them a chance to develop greater empathy and responsibility while giving younger students the ability to find mentors (that they can personally identify with, unlike the ones assigned under current mentor-ship or tutoring programs).

It's worked very well already in the few schools that have tried it:
[http://sudburyschool.com/content/sudbury-model-education]
[https://www.theatlantic.com/national/archive/2012/12/no-teachers-no-class-no-homework-would-you-send-your-kids-here/265354/]

What would be other good ideas and ways to reform the current system?