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Lesson Plan
Curated OER

Guess My Rule: Diversity of Learners Adaptation

For Teachers 3rd - 4th
Students write equations if they change the data of the population to find patterns. They look for patterns in the data regarding male to female ratio (using the lowest possible). Students write a short story for the data that changes...
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Lesson Plan
Curated OER

30-60-90 Right Triangles in Cabri Jr.

For Teachers 9th - 12th Standards
Young mathematicians draw and label right triangles using Cabri Jr. technology. They create other special right triangles and identify the length of the hypotenuse and each leg. Students explore the ratios to determine how the hypotenuse...
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Worksheet
Curated OER

Triangles

For Students 10th
In this triangles worksheet, 10th graders solve 3 extensive informal geometry problems that involve triangles. First, they sketch a triangle, selecting 3 of the sides and constructing 3 midpoints. Students then draw each of 3 medians by...
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Worksheet
Curated OER

Drawing Plans to Scale

For Students 8th - 10th
In this drawing plans to scale activity, students examine how to convert small scale drawings to real life plans. They work with perimeters and areas when given the scale ratio. They complete 7 multi-step questions. They enter the...
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Worksheet
Curated OER

Similar Figure Word Problems

For Students 9th - 11th
In this algebra worksheet, students rewrite word problems using algebraic terminology and solve problems dealing with ratios. There are 12 problems with an answer key.
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Worksheet
Curated OER

Infinite Geometric Series

For Students 10th - 12th
In this geometric series learning exercise, students examine a given geometric series to determine if the series converges or divergeas.  They evaluate and determine the common ratio of a geometric series.  This four-page learning...
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Worksheet
Curated OER

Black Holes....II

For Students 8th - 10th
In this black hole worksheet, students use the equation for time dilation to solve 8 problems including determining the time it takes to receive a GPS signal from space, the time delay for the GPS-Earth system, the distance a radio...
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Worksheet
Curated OER

The Relative Sizes of The Sun and Stars

For Students 9th - 12th
In this relative sizes of the sun and stars learning exercise, students determine the relative sizes of the Earth, Jupiter, the Sun and other stars. Students compare the size of stars given ratios of one star to another.
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Lesson Plan
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The Vitruvian Theory - Does It Apply to You?

For Teachers 8th - 10th
Students explore the concept of the Vitruvian theory.  In this Vitruvian theory lesson, students collect data from their classmates about their arm span and height.   Students compare their ratios of arm span to height with Leonardo Da...
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Lesson Plan
Curated OER

3.14159265

For Teachers 9th - 12th
Students discover the value of Pi.  In this value of Pi lesson, students measure the circumference and diameter of various circles on their graphing calculator.  Students find the ratio of the circumference to the diameter and plot the...
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Lesson Plan
Curated OER

Roofing and Right Triangles

For Teachers 9th - 11th
Students use models and symbols to represent properties of the Pythagorean Theorem. In this right triangle lesson, students connect real jobs to properties of right triangles. They solve word problems applying the correct ratios and...
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Worksheet
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Tricky Triangle

For Students 9th - 12th
In this triangle worksheet, students solve 1 word problem about the lengths of a triangle. Students determine the length of the longest side given the ratio of the angle measures.
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Worksheet
Curated OER

Precalculus Test Sections 5.1 - 5.2

For Students 10th - 12th
In this section worksheet, students simplify given addition and division problems containing ratios with sine, cosine, and tangent.  They factor problems and prove identities.  This two-page worksheet contains 12 problems.
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Worksheet
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Trigonometry Puzzle

For Students 8th - 12th
In this trigonometry learning exercise, students solve for the degree or the ratio in 48 questions using the 6 basic trigonometric functions. 
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Lesson Plan
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Trigonometry

For Teachers 10th - 12th
Young scholars investigate angles converting them from radians to degrees. In this trigonometry lesson, students work with angles and the six different trig ratios. They graph the functions representing each trig functions and identify...
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Lesson Plan
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Unit Circle Lesson Plan

For Teachers 11th - 12th
Learners identify different locations on a unit circle. In this precalculus lesson, students identify the different trig properties and rewrite the equation of a circle in standard form. They use mnemonic devices to help them remember...
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Lesson Plan
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Indirect Measurement, Surveying Trigonometry

For Teachers 9th - 10th
Students measure distances using indirect measurements. In this geometry lesson, students apply proportion and ratios to measure heights of different objects. They differentiate between direct and indirect measurements.
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Lesson Plan
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Indirect Measurement

For Teachers 9th - 10th
Students measure and apply their knowledge of proportion to solve problems. In this geometry lesson, students measure using a meter stick, small mirror and measuring tape. They compare and contrast their measurements to objects outside...
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Lesson Plan
Curated OER

Race and Gender in the Media

For Teachers 9th - 11th
Students analyze race and gender in the media. In this algebra lesson, students apply their knowledge of percents and ratios to determine the representation of race and gender in the media. They discuss and graph their data.
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Lesson Plan
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Solve Right Triangle

For Teachers 9th - 11th
For this trigonometric applications worksheet, students solve for the missing side of a right triangle using a trigonometric ratio. There are 46 questions, 10 of which are word problems.
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Lesson Plan
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Surface Area and Measuring

For Teachers 10th
Tenth graders explore volume and surface area through percentages. In this geometry lesson, 10th graders analyze the surface area of two and three dimensional shapes, then use percents and ratio to compare the two.
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Worksheet
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Tree and Pole

For Students 9th - 11th
In this algebra worksheet, students calculate the length and ratio of two objects, as they relate to each other, when solving this word problem. There is an answer key.
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Curated OER

Direct Variation

For Students 9th - 11th
For this algebra worksheet, students solve equations by applying direct variation relationship. They solve problems using proportions and ratios while using direct variation. There are 3 problems with an answer key.
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Lesson Plan
Curated OER

Perimeter Word Problems

For Teachers 10th
Tenth graders solve for the perimeter and rewrite word problems. In this geometry lesson, 10th graders label different shapes and set up the corresponding ratios as equations. They solve for the missing side and calculate the values for...

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