Teach students (even young kids) the 20/20/20 rule: every 20 minutes, students should focus their eyes on an object 20 feet away for 20 seconds to protect their vision and create healthy habits.
Share Teach students (even young kids) the 20/20/20 rule: every 20 minutes, students should focus their eyes on an object 20 feet away for 20 seconds to protect their vision and create healthy habits. with FacebookShare Teach students (even young kids) the 20/20/20 rule: every 20 minutes, students should focus their eyes on an object 20 feet away for 20 seconds to protect their vision and create healthy habits. with Twitter