small discussion about externalities

we studied that education creates positive externalities. Therefore, the government intervenes in the education market by stimulating the Demand for education using subsidies.

If you are in charge to increase the demand for education and find the way to have more and more individual not only seeking higher education but also being successful in higher education (completing the degree), which strategies would you use? Explain.

use economics theory as much as possible

double space, 12 font size, time new roman, one page, no reference or any outside sources.