Authoritarians go after data. The president has already started.

It's math o'clock! And whether you have just finished solving the most complicated math problem of your life or haven't encountered one in ages, this math riddle is for everyone. The head-scratcher ...

Add Yahoo as a preferred source to see more of our stories on Google. Emily Osorio-Hernandez, 6, writes numbers for a math assignment at Esperanza Elementary School in 2019. (Los Angeles Times) ...

Math scores in the U.S. have been so bad for so long that teachers could be forgiven for trying anything to improve them. Unfortunately, many of the strategies they’re using could be making things ...