Forbes contributors publish independent expert analyses and insights. Linda Darling-Hammond is an expert on education research and policy. PISA scores reveal deep problems in how the United States ...
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How many numbers are on a clock? Try to solve the viral riddle
If you've got the time, we've got the riddle. And it's time for a riddle about time: How many numbers are on a clock?
Clarification: This story has been updated to clarify how University of Colorado researchers handle their data collection. A student digs into a math problem that references his favorite superhero, ...
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