Stacey Jacobson-Francis works on math homework with her daughter Luci in May 2014 at their home in Berkeley. As schools implement national Common Core standards, math has become more complicated at earlier grade levels.
Stacey Jacobson-Francis works on math homework with her daughter Luci in May 2014 at their home in Berkeley. As schools implement national Common Core standards, math has become more complicated at earlier grade levels. Associated Press file
Stacey Jacobson-Francis works on math homework with her daughter Luci in May 2014 at their home in Berkeley. As schools implement national Common Core standards, math has become more complicated at earlier grade levels. Associated Press file