This really might not be enough to prevent a concussion.
This really might not be enough to prevent a concussion. - 

There's a big rush to reduce concussions in sports. But the technology has yet to catch up with the demand

Ever wonder why public radio sometimes feels a little like a classroom? Well there's a reason. More from our new LearningCurve series

Follow Stacey Vanek Smith at @svaneksmith