@khanacademy Real tired of the rules in each practice changing without any notice. It’s hard enough to teach a 7th grader math when it is not your strong subject but the lack of instructions is infuriating. About ready to ditch this and find another math curriculum. 
So sorry to hear this! We definitely don't want you to ditch us. We welcome and appreciate feedback about our content and product. Please share your feedback here: https://khanacademy.zendesk.com/hc/en-us/community/topics/200852348-Content-Requests-and-Feedback …