A presidential race between an incumbent and a challenger, which has played out for most of the year in biting television commercials and fiery speeches, suddenly narrows to a pair of candidates standing side-by-side starting at 9 p.m. Eastern time," writes The Times's Jeff Zeleny. As you watch the debates on Wednesday night, tell us what you think. Did anything that was said "move the needle" on either campaign? We'll be moderating comments live, and choosing our favorite as "Comments of the Moment." In "In 90-Minute Debate, 2 Candidates Stand on Equal Footing," Mr. Zeleny notes some things to look for as you watch: The challenge for both men in the debate, to be moderated by Jim Lehrer, will be to enliven the conversation with fresh details, rather than offering a line-by-line replay of the campaign so far. There are many potential flash points, including: health care;... the nation's fiscal crisis and solutions for reaching a comprehensive deficit reduction deal. Yet the chemistry between the two candidates cannot be rehearsed and their interactions could be just as important as the answers to the debate questions. Mr. Romney has practiced being "respectfully aggressive," a senior adviser said, with a goal of pleasing Republicans who believe he has been too passive. Both candidates will come to the debate armed with well-practiced one-liners, the moments they hope will become sound bites that will shape the narrative in the days to come. It will be telling how long they wait before starting to unload them and how they address one another from the outset of the debate. The rise of social media has already reshaped the race, raising questions of whether the audience will match the 52.8 million viewers who tuned into the first debate between Mr. Obama and Senator John McCain four years ago. Students: Tell us how you're reacting to this first debate, both during it and afterward. What were your favorite moments during the debate? Why did they stand out for you? What did the candidates' body language say? Did anything the candidates said or did on stage sway your opinion one way or the other? Do you think there was a clear winner? Do you think this debate might affect the direction of this election? Feel free to assign your students a class code of some kind to append to their names so you can see their responses. We also have a large, and growing, collection of resources for Election 2012 including lessons, quizzes, crosswords and much more.