Is this the coolest teacher ever?

An awesome video has emerged from the UK of a science teacher freestyle rapping to his year eight class.

The footage, filmed this week at a school in London, shows Christian Foley making up his lyrics on the spot, based on scientific words written on the white board by his students.

He later wrote online: "This is genuinely my day job.

"Ever wondered what a rap teacher actually does at school?"

"As part of Science Week, my Year Eights put seventeen scientific terms on the board, and asked me to freestyle them all in order," he continued.

"From Pollen Grains to Germanium - Challenge Accepted."