Israel Threatens Strikes in Lebanon as Crisis Spills Beyond Iran Italy pledged air defense weapons to help Gulf nations defend against attacks, and Iranian drones landed in Azerbaijan. Analysis Trump ...

Explore a wide range of recent research in mathematics. From mathematical modeling to why some people have difficulty learning math, read all the math-related news here.

Nicholas Kristof, an Opinion columnist, joins us in March to talk to teenagers all about opinion writing. Post your comments and questions by March 15. By The Learning Network More preteen athletes ...

Use tiles to represent variables and constants, learn how to represent and solve algebra problem. Solve equations, substitute in variable expressions, and expand and factor. Flip tiles, remove zero ...