Reading Too Much

I was doing some guided reading groups with my 5th graders this week and we were doing pretty good. I had the kids all on the big table and we were reading quietly to ourselves and I was spending about 90 seconds with each kid and making the rounds.

Then after reading a few more minutes, one of the girls says to me, "I can't do this."

"What? You're doing a great job." It's only been about six minutes since we had started.

"I can't read anymore."

"How come?"

"I've got asthma."