Maths is a pretty heavy and for some, boring subject! But, leave it to one teacher to make things a little bit 'exciting' for his students. 

A Taiwanese teacher, by the name Changhsu, uses Pornhub to offer online Mathematics courses. Check out his YouTube video here!

His video has been viewed 1.6 million times. So far he has been earning NT$7,500,000 (RM1.12 million) per year, thanks to his profitable online course. 

The 34-year-old has a master's degree in the subject. In fact, he has been teaching online in Taiwanese schools for 15 years. 

Chang started to teach his class on Pornhub last year as he wanted more students to tune in. 

According to him, "I thought that if I uploaded my videos there, a lot of people would see them."

Many of his students actually came to know him through Pornhub. Right now, Chang is a verified member on Pornhub! 

He's definitely a genius both in Mathematics & marketing!