For our number talk today I gave my 8th graders the question from Day 37 of Math Arguments 180, involving 0.9999… being equal to 1. It was great. They had a great argument back and forth and when I told them it was equal to 1 some were up in arms. They refused to accept it (even after I proved it to them) and wanted to find a mathematician and tell him that he was wrong. Some of them got really worked up about it. It was awesome!