From YouTube, produced by New Mexico State University

Ratey pops up when you least expect him. And he can't resist pointing out the rates and "purrportions" in daily life.
You'll never again overlook how everyday decisions rely on mathematical reasoning about rates.
Ratey the Math Cat addresses number... and operations standards as well as the process standard, as established by the National Council of Teachers of Mathematics (NCTM). It supports students in:
Understanding and using ratios and proportions to represent quantitative relationships.
Building new mathematical knowledge through problem solving.
Solving problems that arise in mathematics and in other contexts.
(3min)[more]

Dunk Tank is a math-themed game show created by the producers of Cyberchase and starring Harry from Cyberchase For Real. Using a combination of video and interactive gaming, each program addresses a single topic in the 6th grade math curriculum and s...tudents compete with themselves for high scores. Dunk Tank is an independent learning experience for students to complete in 15-30 minutes, depending on their proficiency, and can also be used to support teacher-led instruction. In this interactive, Harry explains key concepts about ratio and proportion, including what each one is and how to use them to find answers to problems. Students play Sleuths on the Loose, a mini-game that challenges students to use what they know about ratios to find the height of some mysterious cyber-creatures; watch a comic video about entertaining using proportional relationships between parts of the body; and answer other questions designed to help them further their understanding of ratio and proportion. Students can access support using a glossary, defining key math terms, and a menu of short segments to re-watch.[more]

The instructor uses a white board to model an example of a ratio in math is that the ratio of people to legs is 0.5, or one divided by two. Learn ratios and proportions in math with this video. (01:31)

Ratios and proportions both involve comparisons between two
things, such as gallons to miles. A math teacher in this video teaches how to decide which variable should be the numerator or denominator in ratios or proportions showing examples on displ...ay.[more]

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