Teachers are important.They can make or break a class.A great teacher can make a boring subject interesting while an exciting subject can be killed by a teacher who isn't good at teaching.
Of all the subjects，math is probably the hardest.However，a math teacher Matthew Weathers made himself famous on the Internet because he brought excitement into his class successfully.
Matthew likes to play jokes on his students.He also likes to make prank videos（恶作剧视频）when he is not busy.Then he puts them on the Internet.Each one is interesting and creative.His most popular video was made on April Fool's Day.In the video，he pretended to clean up a stain（污点）on the screen.In fact.he was interacting with（互动）a video that he recorded earlier.It made him popular in his school.His students all say thanks to him for trying to make the classes fun.
