Myths about the brain are common among teachers worldwide and are hampering teaching, noted a study that called for better communication between neuroscientists and educators.
Over 70 percent of teachers in all countries wrongly believe a student is either left-brained or right-brained, peaking at 91 percent in Britain, the findings showed.
A quarter or more of teachers in Britain and Turkey believe a student's brain would shrink if they drank less than six to eight glasses of water a day.
Around half or more of those surveyed believe a student's brain is only 10 percent active and that children are less attentive after consuming sugary drinks and snacks.
"These ideas are often sold to teachers as based on neuroscience - but modern neuroscience cannot be used support them," said Paul Howard-Jones, author of the article from University of Bristol in Britain.
"These ideas have no educational value and are often associated with poor practice in the classroom," Howard-Jones added.
The findings appeared in the journal Nature Reviews Neuroscience.
