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Re:Stepping into math: Open-sourcing our step-by-step solver by analog31 on Thursday January 19, 2017 @02:20PM (#13438662)
Note that I didn't downvote you. I actually consider the answer wrong too, and the professors agreed too. One of them said: "Obviously the student doesn't understand the problem."

I thought to myself: "You understand the problem because you know the answer." But I held my tongue.

But at the present state of the art, the student has no idea why the answer is wrong. That's where I think their high school math background failed them.

Re:Stepping into math: Open-sourcing our step-by-step solver by yequalsx on Thursday January 19, 2017 @02:27PM (#13438710)
The danger of always using nice numbers! I've taught topics where I thought I had the best lecture, the best examples and that it would be impossible for a student to misinterpret the method. Some still did come up with flawed thinking. It's hard.