This lesson multiples numbers using both partial products and the area model ...

Using what we know about shapes to learn about perimeter ...

While you won't find an apology in math books these days, you will find a curriculum — word problems and all — not that different from the lessons that filled textbooks 500 years ago.

A teacher uses Half-Life: Alyx to provide an online lesson to his students, utilizing the in-game marker feature to discuss angle vocabulary.