Michael Fletcher & Jose Antonio Vargas:

Arguably the most animated and substantial exchange was between the president and a longtime teacher from Overbrook High School in West Philadelphia who was seated a few feet behind him. The teacher asked Obama for his definition of “a charter school” and “an effective teacher.” While Obama quickly dispensed with the first part of the question, he could not get the teacher to answer when he asked whether in her 15 years on the job she has encountered colleagues who she would not want to teach her own children.
“My point is that if we’ve done everything we can to improve teacher pay and teacher performance and training and development, some people just aren’t meant to be teachers, just like some people aren’t meant to be carpenters, some people aren’t meant to be nurses. At some point, they’ve got to find a new career,” he said.