Students in Iowa must wear heart monitors:
"It will be a large portion of their grade, because we want to grade them on what they're actually doing in our class," Dubuque Schools Athletic and Wellness Director Amy Hawkins told ABC News.Have a heart...or get an F?
Teachers will use the information collected from the heart rate monitors to write report cards.
"It really takes the opinion out of things," Hawkins said. "You know it's not really 'I think your kid is doing this and this in class.'"