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.

This comprehensive study guide highlights the main terms and formulas needed to understand linear equations. Examples are included.

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Convert rates to unit rates and compare the unit rates.

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Among rational numbers, identify and write different forms of equivalent ratios.

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Learn what ratios are and how to arrive at equivalent ratios. Identify and write equivalent ratios.

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In this lesson students write proportions and then solve proportions by using equivalent rates. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.

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In this lesson students recognize proportions as a statement of equivalent ratios. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.

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In this lesson students write proportions and then solve proportions by using cross-products. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.

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In this lesson students identify proportions by cross multiplying or simplifying ratios. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.

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In this lesson students write ratios to model real-world scenarios. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.

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In this lesson students write ratios, order ratios from least to greatest and greatest to least and compare ratio. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.

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In this lesson students simplify ratios by dividing by the greatest common factor. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.

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In this lesson students write ratios in simplest form. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.

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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.

Videos offering step-by-step solutions to problems involving ratios. A math teacher and students will show you how to figure out answers to "write the ratio 16 to 48 as a fraction in lowest terms," "give the ratio of 2/3 to 4/9 as a fraction in lowest terms," and others. In the left-hand menu, click on Basic Mathematics, Ratios, Ratios are Fractions.

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