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30-60-90 triangle
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An interactive applet and associated web page that demonstrate the properties of a 30-60-90 triangle. The applet shows a right triangle that can be resized by dragging any vertex. As it is dragged, the remaining vertices change so that the triangle's angles remain 30 degrees, 60 degrees and 90 degrees The text on the page points out that the sides of a 30-60-90 triangle are always in the ratio of 1 : 2 : root 3 Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

Subject:
Geometry
Mathematics
Material Type:
Reading
Simulation
Provider:
Math Open Reference
Author:
John Page
Date Added:
02/16/2011
5.NF.5 Understanding Multiplication as Scaling
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CC BY-NC-SA
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This resource includes a flawed reasoning task that reflects 5.NF.5. Students must find the flaw in an argument and present it correctly. Then, they should provide a reasoning behind their thinking.

Subject:
Education
Mathematics
Material Type:
Assessment
Homework/Assignment
Date Added:
07/18/2018
5 Pythagorean Solids
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CC BY-NC-SA
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This OER explores the basic organization of the Pythagorean Solids. It contains both an activity as well as resources for further exploration. It is a product of the OU Academy of the Lynx, developed in conjunction with the Galileo's World Exhibition at the University of Oklahoma.

Subject:
Arts and Humanities
History
Mathematics
Material Type:
Activity/Lab
Diagram/Illustration
Homework/Assignment
Lecture Notes
Primary Source
Student Guide
Date Added:
10/09/2015
5.c.4-1 Multi-Step Fraction Word Problems
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CC BY-NC-SA
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This resource includes two multi-step tasks where students connect diagrams and equations in order to solve real world problems. This task includes skills learned in the common core standard 5.NF.2

Subject:
Mathematics
Material Type:
Activity/Lab
Date Added:
08/14/2018
Adding Bugs -- Out Teach
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CC BY-NC-SA
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In this lesson, students will develop their fluency with addition and subtraction through a "real-world" application of collecting data about insects in the garden.

Subject:
Mathematics
Material Type:
Lesson Plan
Author:
Out Teach
Date Added:
07/22/2021
Adding Fractions
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CC BY-NC
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Students will review and practice the concepts of adding fractions. This is a great tool to use for extra practice or review for a test.

Subject:
Mathematics
Material Type:
Activity/Lab
Date Added:
06/09/2017
Adding Insects -- Out Teach
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CC BY-NC-SA
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In this lesson, students will develop their fluency with addition and subtraction through a real world application of collection data.

Subject:
Mathematics
Material Type:
Lesson Plan
Author:
Out Teach
Date Added:
07/22/2021
Adding Using Arrays -- Out Teach
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CC BY-NC-SA
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Students will use objects found in the outdoor classroom to create rectangular arrays and write equations to express the total. Standard(s): 2.NC.OA.4Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express

Subject:
Mathematics
Material Type:
Lesson Plan
Author:
Out Teach
Date Added:
07/22/2021
Adding and Subtracting Mixed Numbers Using a Number Line
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CC BY-NC-SA
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This resource includes three tasks surrounding the Common Core Standard 5.NF.2 - Adding and Subtracting Mixed Numbers with Unlike Denominators Using an Open Number Line and Fraction Equivalence. The tasks involves looking at real Maryland snowstorm data and each task builds off the previous task.

Subject:
Education
Mathematics
Material Type:
Assessment
Homework/Assignment
Date Added:
07/17/2018
Algebraic Reasoning -- Out Teach
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CC BY-NC-SA
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Students work with the concept of equality and balance to solve algebraic equations.

Subject:
Mathematics
Material Type:
Lesson Plan
Author:
Out Teach
Date Added:
07/22/2021
Alternate Exterior Angles
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An interactive applet and associated web page that demonstrate the alternate exterior angles that are formed where a transversal crosses two lines. The applets shows the two possible pairs of angles alternating when in animation mode. By dragging the three lines, it can be seen that the angles are congruent only when the lines are parallel. When not in animated mode, there is a button that alternates the two pairs of angles. The text on the page discusses the properties of the angle pairs both in the parallel and non-parallel cases. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

Subject:
Geometry
Mathematics
Material Type:
Reading
Simulation
Provider:
Math Open Reference
Author:
John Page
Date Added:
02/16/2011
Analyzing Data - Out Teach
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CC BY-NC-SA
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STUDENT ACTIVITY - 1st -- VAThis is a distance-learning lesson students can complete at home.Students will collect data outdoors and record the data in a table. Then, they will compare the numbers collected by writing greater-than, less-than or equal-to statements.This activity was created by Out Teach (out-teach.org), a nonprofit providing outdoor experiential learning to transform Science education for students in under-served communities. .

Subject:
Mathematics
Material Type:
Activity/Lab
Author:
Out Teach
Date Added:
07/22/2021
Angle Relationships
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CC BY-NC
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Students will practice and review the concepts of angle relationships. This could be used as a review tool.

Subject:
Mathematics
Material Type:
Homework/Assignment
Lesson
Date Added:
06/08/2017
Angles of the Sun -- Out Teach
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CC BY-NC-SA
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In this lesson, students will apply the use of angles to a real-world problem—finding the angle of the sun to determine the placement of solar panels. This lesson can be used to teach about angles, or to reinforce and apply understanding of angles.

Subject:
Mathematics
Material Type:
Lesson Plan
Author:
Out Teach
Date Added:
07/22/2021
Applied Mathematics, Third Edition
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CC BY-ND
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Applied Mathematics, Third Edition. This textbook was written for the math component for Associate of Applied Science degrees at the College of Southern Nevada.

Subject:
Career and Technical Education
Geometry
Mathematics
Measurement and Data
Numbers and Operations
Ratios and Proportions
Statistics and Probability
Material Type:
Textbook
Date Added:
08/16/2019
Area and Square Feet -- Out Teach
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CC BY-NC-SA
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In this lesson, students in this lesson will learn about, connect, and apply the use of the area to a real-world problem—creating a planting guide for the garden. Students will determine the square footage of the garden and use this information, along with a planting chart to create their own plan.Background for instructors:Math in the REAL world: Area and square feetSquare foot gardening is one way that ensures a vegetable garden bed can thrive. It is used to ensure not too many plants of a specific variety are planted in a single area. Using the square foot model keeps plants properly spaced, providing a perfect real-world context to teach area, apply multiplication strategies, and have students work collaboratively. Most garden beds are 8 x 4 resulting in 32 square feet to work with. It is possible however to have beds of different sizes. While 32 square feet to work with is what is used in this lesson, the methods and chart can be used for any rectangular planting area.

Subject:
Mathematics
Material Type:
Lesson Plan
Author:
Out Teach
Date Added:
07/22/2021
Area and square feet-- Out Teach
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CC BY-NC-SA
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Square foot gardening is one way that ensures a vegetable garden bed can thrive. It is used to ensure not too many plants of a specific variety are planted in a single area. Using the square foot model keeps plants properly spaced, providing a perfect real-world context to teach area, apply multiplication strategies and have students work collaboratively. Most garden beds are 8 x 4 resulting in 32 square feet to work with. It is possible however to have beds of different sizes. While 32 square feet to work with is what is used in this lesson, the methods and chart can be used for any rectangular planting area.

Subject:
Mathematics
Material Type:
Lesson Plan
Author:
Out Teach
Date Added:
07/22/2021