I was just asked to sort out a problem with this video on YouTube:

Our maths teacher wanted to use it but it wouldn't play here with Safety Mode enabled. I was able to help him.

The point of posting this is that he was so enthusiastic about this video I thought other maths staff might like to know about it.

That same maths teacher also mentioned that he liked the look of the modified album covers in the background and that he would be interested in finding where he could get hold of the same or similar pictures for his wall. If anyone has can point me in the right direction I it would make his day if I could go back to him with more information.

Thanks in advance.