Rocket Science (2007) on Netflix

Coming of age in Plainsboro, New Jersey. High school student Hal Hefner stutters. On the evening his parents stop arguing and separate, 43 miles away at the state tournament, his school's legendary debater, Ben Wekselbaum, goes blank mid-sentence, Ben's teammate Ginny Ryerson doesn't get a first-place trophy, and the world changes. That fall, to Hal's amazement, Ginny recruits him for the debate team, mentors him, and will be his partner. He still has his stutter, but he works hard and he falls in love with Ginny. On the day of the first debate of the season, the world changes again. From then until the day of the state tournament, Hal has a lot to sort out. Is love rocket science?