If you use a school network to access the Internet, chances are you are subject to filtering of the sites you visit. Some schools do this very lightly and only block explicit sites. Other schools are very heavyhanded and even block Facebook and Youtube. This may go back to our desire to overprotect our children I suppose. (see Are Schools Producing Fragile People?) No matter what the reason, those days of filtering are finite in number. Samsung has given a preview of 5G network technology. They claim speeds of up to 100 times faster than 4G when it comes out in 2020.
Having been around technology for a long time I doubt the speeds will actually roll out that fast but even so, it should be a substantial jump in performance. I find that 4G is fast enough for most of what I do today but of course applications will always emerge to take advantage of the increased performance. What matters is that even 4G is plenty fast enough to do web browsing from your phone or tablet in a classroom. This gets around school web filtering.
2020 is 7 years away, which is longer than smartphones have been around. Imagine what they will be capable of by then. They will have a direct, high speed connection onto the web and schools won’t have any say in where the student goes. Instead it will be up to whatever morals the parents have instilled, which is the way it should be.