Illustrative Mathematics
Illustrative Mathematics: 3.oa Markers in Boxes
The purpose of this task is for students to compare two problems that draw on the same context but represent the two different interpretations of division, namely, the How many groups? interpretation and the How many in each group?...
Quia
Ixl Learning: Fractions Overview
Brush up on your math skills relating to fractions then try some practice problems to test your understanding.
PBS
Pbs: The Lowdown: Rot and Rubbish: The Rancid Truth About How Much Food We Waste
Explore the math of worldwide food waste, with focus on percentage, in this infographic from KQED. In the accompanying classroom activity, students predict the percent of food in each of the various categories (e.g., grains, fruit, etc.)...
PBS
Pbs: Kid Vid: Dividing Fractions
Compare a division problem with whole numbers to a similar problem about dividing fractions in this interactive from KET. Students watch a video of a peer talking about a fraction problem that involves equal groups, with the number of...
Khan Academy
Khan Academy: Ratio Tables
Explains what ratio tables are. Includes simple examples and a few practice problems.
Other
Athens State University: Greater Than, Less Than
A very thorough lesson plan where students explore the concept of "less than" and "greater than," using cookies.
CK-12 Foundation
Ck 12: Arithmetic: Equivalent Ratios
[Free Registration/Login may be required to access all resource tools.] Learn what ratios are and how to arrive at equivalent ratios. Identify and write equivalent ratios.
University of Cambridge
University of Cambridge: Nrich: Rectangle Tangle
On this one page website sharpen your logic and fractional part skills while working on this challenge. The solution is available to double check your solution.