CK-12 Foundation
Ck 12: Elem Math: Dividing to Find the Unit Working Product
[Free Registration/Login may be required to access all resource tools.] In this learning module, students solve word problems where they must find the unit working product, which is the whole product divided by an amount used or...
Khan Academy
Khan Academy: Writing Proportions
Practice writing proportions to describe real-world situations. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.