AAA Math's interactive tutorials and lessons assist students grades K-8 improve their understanding of a wide range of arithmetic topics. Students are provided with immediate feedback as they complete the "Learn," "Practice," and "Play" portions of each lesson. Browse AAA Math's contents by subject or by grade level.

Module 2 builds on students' previous work with units and with functions from Algebra I, and with trigonometric ratios and circles from high school Geometry. The heart of the module is the study of precise definitions of sine and cosine (as well as tangent and the co-functions) using transformational geometry from high school Geometry. This precision leads to a discussion of a mathematically natural unit of rotational measure, a radian, and students begin to build fluency with the values of the trigonometric functions in terms of radians. Students graph sinusoidal and other trigonometric functions, and use the graphs to help in modeling and discovering properties of trigonometric functions. The study of the properties culminates in the proof of the Pythagorean identity and other trigonometric identities.

Find the rest of the EngageNY Mathematics resources at https://archive.org/details/engageny-mathematics.

Watch a dodge ball game and figure out what method is best to track the winning team. This animated video from Math Snacks focuses on using what you know about differences and ratios to decide which is a better measure of who is winning the game, taking math out of the classroom and into the sporting arena.

Students will be using a hands-on approach to learning about length, capacity and weight.

To understand the concept of ratio and use ratio language to describe a ratio relationship between two quantities.

Students will be using ratio tables to convert units of metric measurements and looking for patterns to help make the problems easier.

How can you use a bar model to represent ratio problems? Students work with problem sets on the Thinking Blocks website.

Using a tape diagram is one of the key models for ratios and proportions.

The ratio table is a tool that students can use to solve a variety of problems.

Somehow, a bank robber managed to infiltrate Mercenary Bank - and he's looking to fill a briefcase with a million dollars in stacks of 50 dollar bills. But is his briefcase large enough to hold a million bucks?

Learners explore the concepts of rate and ratio in a variety of problem-solving situations. Worksheets contain definitions and visual representations of concepts. Link to related ratio game. Other skills include measurement, data analysis, and number sense. Acrobat Reader required.