Between my junior and senior years of high school, I did a paid internship along with a few dozen other high schoolers working on CanDo, a module for SchoolTool

Between my junior and senior years of high school, I did a paid internship along with a few dozen other high schoolers working on CanDo, a module for SchoolTool (an OSS school management platform built on Zope). It was all paid for by a combination of state funds, local school district money, and $10,000 from Mark Shuttleworth. CanDo is grading software that tracks competency instead of percentages. Each student has a rating on various skills that the class is supposed to teach, something like "Familiar with basics." The top level is being able to teach the skill to others. Though that project is now stagnating, there's still a mandate to explore that type of grading software from the state of Virginia. (Incidentally, paying high schoolers to work on something practical is a great way to get them to learn.)