Like many students around the world, Eithne, 14, in Chorley, United Kingdom, was struggling to keep up in math at school after more than a year of COVID-19 related disruptions. In June 2021, her ...

BATON ROUGE, La. — About two dozen second graders sat on the carpet at the front of Jacquelyn Anthony’s classroom, reviewing how to make tens. “Two needs eight!” the students yelled out together. “Six ...