Sometimes the best way to learn grammar is to use senses other than our eyes. Consider the following videos —
and for prepositions:
It would have been much easier to learn grammar had teaching videos like these been available when I was in grade school. Alas, I had to learn grammar the hard way.
Sometimes I get a manuscript that is so grammatically bad that I get tempted to embed a video like those above that gets the point across without my having to come right out and say, “Your manuscript is an insult to English!” Of course, diplomacy wins out and I neither exclaim my exclamation nor embed a video hint.