Updated On: 29 June, 2012 01:50 PM IST | | IANS
Schools should not teach difficult subjects like mathematics and physics to children on Thursdays because it was "the hardest day of the week", Russia's chief sanitary doctor has said in a recommendation
"Children have their own bio-rhythms and Thursday is the hardest day of the week," RIA Novosti quoted Gennady Onishchenko as telling the Ekho Moskvy radio station in an interview.

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