Texas Instruments
Texas Instruments: Follow the Golden Rule
Students find ratios and calculate measures of central tendency for sets of data. They understand the concept of the Golden Ratio. They use box-and-whisker plots to analyze data.
CK-12 Foundation
Ck 12: Geometry: Area and Volume of Similar Solids
[Free Registration/Login may be required to access all resource tools.] This concept teaches students to use ratios between similar solids to solve for missing information. Students examine guided notes, review guided practice, watch...
Texas Instruments
Texas Instruments: Math Today Wing Tabs Save Fuel
Using the USA TODAY Infograph, 'Wing tabs save fuel', ratios and proportions will be used to explore the concept of similarity between a drawing/model and the actual dimensions. The effects of dilation (size change) on an image and...
CK-12 Foundation
Ck 12: Geometry: Area and Perimeter of Similar Polygons
[Free Registration/Login may be required to access all resource tools.] This concept teaches students to find area and perimeter of similar polygons using ratios. Students examine guided notes, review guided practice, watch instructional...
CK-12 Foundation
Ck 12: Statistics: Levels of Measurement
[Free Registration/Login may be required to access all resource tools.] This Concept introduces students to the different levels of measurement.
Education Place
Houghton Mifflin: Eduplace: Extra Practice Quiz Percent as a Ratio
Find the percent using a ratio and find a ratio using a percent. Read the interactive quiz rules and then click on the "Begin" ticket. If you answer incorrectly you get one more chance to try again then you are told the correct answer....
TeachEngineering
Teach Engineering: The Claw
Students learn about gear ratios and power by operating toy mechanical cranes of differing gear ratios. They attempt to pick up objects with various masses to witness how much power must be applied to the system to oppose the force of...
Government of Alberta
Learn Alberta: Exploring Similarity and Congruence
Begin by watching this captivating video showing how the concepts of similarity and congruence are found in road signs. Following the video [1:27], an interactive applet allows students to resize, flip, move and rotate triangles to...
TeachEngineering
Teach Engineering: Exploring Solar Power
This unit provides students the opportunity to explore methods engineers have devised for harnessing sunlight to generate power. Students will initially explore heat transfer and heat storage through the construction, testing, and...
Sophia Learning
Sophia: What Are Ratios?
This lesson defines the term ratio. Students can look at a two-page presentation of notes and practice problems.
ClassFlow
Class Flow: Perimeter of Regular Figures
[Free Registration/Login Required] This elementary flipchart presents the concept of regular shapes and ways of measuring perimeter. It also explores the ratio of perimeter to side length that equals the number of sides.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Solving a Ratio With & Without a Diagram
A student is searching for a solution to a ratio question without using a diagram. Dr. Math helps to break it down both with and without a diagram. An understanding of fractions, multiplication, and basic algebra is necessary to get this...
Education Development Center
Tune in to Learning: Get Going With Rate
Explore the concepts of rate, distance, and speed in this interactive lesson. Discover how to use formulas to solve word problems and calculate salaries. A concise lesson with excellent examples, connections to real world experiences,...
Purple Math
Purplemath: Quadrants and Angles
Explains how to model angles in the x,y-plane, and demonstrates how to extend the concept of trig ratios to angles larger than 90 degrees.
Lawrence Hall of Science
The Math Page: Skill in Arithmetic: Proportionality
Acquire a deeper understanding of the concept of proportionality. Concise definitions, detailed examples, and an interactive worksheet to apply what you have learned.
Alabama Learning Exchange
Alex: Maybe Maybe Not
This is a beginning lesson on the concept of probability. Through a series of informal comparisons, the student will explore the chances of various outcomes of an event. The student will use vocabulary associated with probability.This...
Education Place
Houghton Mifflin: Eduplace: Lesson Plan: What Is It? Rational Numbers
This site is a great place for lesson information on the concept of rational numbers. Three other tabs are available besides the-What Is It? tab. They are Tips and Tricks, When Students Ask, and Lesson Ideas. Each tab has just the right...
Mangahigh
Mangahigh: Number: Percent Increase and Decrease Calculator
Students learn about the concept of percent change by exploring a tutorial. They can then test their knowledge by taking a ten question assessment that increases in difficulty as they correctly answer questions.
Mangahigh
Mangahigh: Number: Identify Halves and Quarters
This site provides students practice with the concept of halves and quarters. Students can learn about the topic by completing an interactive tutorial. Students can then take a ten question timed test to practice the skill.
Other
All Elementary Mathematics: Proportionality and Ratio
A brief explanation of the mathematical relationship between ratio, proportion, and proportionality. Examples are included.
Rice University
Rice University: Cynthia Lanius: Geometry Online
This is a site for geometry lovers. Chock-full of puzzles, games, interesting geometry facts, and online activities.
Lawrence Hall of Science
The Math Page: Trigonometry
Concepts in Trigonometry are explained and illustrated here by a member of the math department at Borough of Manhattan Community College.
PBS
Pbs: Jazz and Math: The Beat Goes On
This lesson plan will require students to collect data through listening, counting and timing. They will use ratios, rates, and proportions to report data. They will also demonstrate an understanding of the concepts of rhythm and tempo...
TeachEngineering
Teach Engineering: Mechanics Mania
Through ten lessons and numerous activities, students explore the natural universal rules engineers and physicists use to understand how things move and stay still. Together, these rules are called "mechanics." The study of mechanics is...