The latest National Assessment of Educational Progress' Nation's Report Card showed big declines in students' math performance — in some cases, dipping as low as the numbers of 20 years ago. The results showcased the effects of the pandemic and in particular how hard it was to teach math, say Professors Heather Hill and Jon Star. 

Read more and listen to the chat here https://www.gse.harvard.edu/news/22/11/harvard-edcast-making-difference-math