What the title says. I got my degree in math last year and now I'm working on a master's independent study project through my education department finding math tasks for K-12 curriculum aligned with the common core standards. These could be tasks out of textbooks, online resources, games, apps, whatever. Specifically, I'm looking for 8th grade tasks, but anything will help!
Here is two resources that I have (I can't post my entire list right now because I just made an account here and am restricted to 2 links until I get 10 reputation)
Also if you have any recommendations on textbooks, that would be great! Right now I'm just trying to gather as many resources as possible to start analyzing.
edit: now that I have more than 10 reputation, here's my complete list:
And I posted this question to reddit.com/r/math earlier and got these resources from sjhatters:
Everything Make an account. It's a goldmine.
Some are UK specific.