Just noticed this, and i would say that it's not added most of the time, I noticed it on both of the sites I am on.

that would be so useful

You could buy ad-free?

You can do this yourself by manipulating the page quite simply just a bit of technical knowledge is needed.

You could also do more homework yourself. Or start a new topic, don't forget about daily riddles and remind your cluster members.

They were working on something many of the sites were down for a few hours. They work now. Sometimes it works if you try accessing it from a private window. 

Ideally, they happen randomly in each 4-hour window, but they could be broken a bit. 

You did not specify the site. Contact the mentor of the course and the MoM of the site.

This sounds like a cool class would it fit in the site? You would have to ask a MoM of that site, I believe. Or you could join another site that has such a class.

Love it!