In a near future state, we can get to a 1:1 student and teacher ratio. Something that is powered by a combination of the following:
I think, 1:1 student and teacher ratio is 7 to 10 years out.
In the interim, MOOCs can help. MOOCs have come a long way since the early days of OpenCourseware (MIT). Today you get quality content from virtually all the leading platforms. From Udacity to Coursera, Khan Academy to Udemy.
However, the engagement and completion rate for MOOCs has been an issue. And I think that these ratios would be much higher if there was: