An Ohio dad explains what went into writing a check to his sons school using a Common Core math equation.\r \r An Ohio dad explains what went into writing a check to his sons school using a Common Core math equation.\r \r A frustrated Ohio dad who wrote a check to his sons elementary school using Common Core math found for the perfect equation for viral fame. Doug Herrmann .\r \r The Dad Who Wrote a Check Using “Common Core” Math Doesnt Know What Hes Talking About PAINESVILLE, Ohio-Frustrated over the complex teachings of .