Teacher sings cringey pop songs to high school kids on the first day of school

As we all know, the kids went back to school this week. Even if you don't have kids you'd have known what was going on simply by looking at Facebook and seeing the pictures of hideous gap toothed kids with the caption "my baby's first day back at school".

The teachers were all smiles after their 6-week long summer break and they were eager to start the new term. Some even brought in sweets and biscuits for the kids.
One teacher though, went above and beyond the call of duty and actually sang a medley of pop songs to a bunch of high school kids but changed to lyrics to keep in with the school theme.

It's the most cringey fucking thing I've ever seen!