I have been a teacher for over 20 years - all the stuff I upload has been tried and tested in my classroom. I don't mind a discussion on Twitter too where I also share new resources. I now have a personal website: https://andylutwyche.com/
A sheet where students can pick the section on which they need more work (self-differentiated no less). Ranges from plain old fractions, through functional plain old fractions, through mixed numbers through functional mixed numbers. No bells, whistles, anything like that, just a load of questions. I have added a 'Prove It' sheet so that the class can show you what they can now do.