# Arithmetic Workout

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Brush up on your multiplication, division, and factoring skills with this interactive multiplication chart. Three levels and timed or untimed options are available.

Material Type: Simulation

Author: Michael Dubson

# Create a Graph

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Graphs and charts are great because they communicate information visually. For this reason, graphs are often used in newspapers, magazines and businesses around the world. Here you will find five different graphs and charts for you to consider.

Material Type: Activity/Lab, Interactive, Teaching/Learning Strategy

Author: NCESKids&#39;Zone

# Corbin Intermediate Distributive Property of Multiplication

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A demonstration of the distributive property of multiplication using models. This video is less than 15 minutes.

Material Type: Lecture

Author: nlc464

# Benchmark Fraction Brownie Mix

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Students will be introduced to addition, multiplication, and division of the benchmark fractions 1/2, 1/3, and 1/4 with a fun, hands-on experience. Students will layer the dry ingredients for a brownie recipe into a canning jar while having a rich discussion that aides visualizing operations with fractions. This shared experience can be referred to during future instruction.

Material Type: Activity/Lab, Lesson Plan

Author: Connie Rivera

# Algebra 1 (2nd Student's Edition)

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A work in progress, CK-12's Algebra I Second Edition is a clear presentation of algebra for the high school student. Topics include: Equations and Functions, Real Numbers, Equations of Lines, Solving Systems of Equations and Quadratic Equations.

Material Type: Textbook

Authors: Andrew, Annamaria, Anne, Eve, Farbizio, Gloag, Rawley

# Acid (and Base) Rainbows

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Students are introduced to the differences between acids and bases and how to use indicators, such as pH paper and red cabbage juice, to distinguish between them.

Material Type: Activity/Lab, Lesson Plan

# What Are the Different Parts of a Graph?

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Being able to read a graph isn't just vital for an algebra class. Graphs and charts are used everywhere! We'll take a crash course on the basic x/y plane used in algebra and give you the fundamental vocab you need. This lesson is on the different parts of a graph. Knowing the vocabulary for the different parts of the graph is really useful because it allows you to do more than just draw it on your paper and think about it in your head; it allows you to talk about it with other people and express what you're doing in words.

Material Type: Lecture

# A+ Click K-12 Math Test

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A+ Click is an interactive collection of more than 3700 math problems and answers for K-1 K-12 school program. It defines the personal level of math knowledge. You move up into the next level if you give 5 correct answers in a row. Practice makes perfect.

Material Type: Activity/Lab, Assessment, Game, Lecture Notes

Author: Igor Kokcharov

# Rectangle Multiplication

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This virtual manipulative allows the user to visualize the product of two factors in three different ways: click on any of the options below the array to choose Grouping, Common, or Lattice.

Material Type: Diagram/Illustration, Interactive

# CC.4.NF.1 Extend understanding of fraction equivalence and ordering.

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Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b) by using visual fraction models, with attention to how the number and size of the parts differ even though the two fractions themselves are the same size. Use this principle to recognize and generate equivalent fractions. (Grade 4 expectations in this domain are limited to fractions with denominators 2, 3, 4, 5, 6, 8, 10, 12, and 100.)

Material Type: Lecture

Author: Como Molina

# CTE Agribusiness & Food Products and Processes: Dairy Barn

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This task was developed by high school and postsecondary mathematics and agriculture sciences educators, and validated by content experts in the Common Core State Standards in mathematics and the National Career Clusters Knowledge & Skills Statements. It was developed with the purpose of demonstrating how the Common Core and CTE Knowledge & Skills Statements can be integrated into classroom learning - and to provide classroom teachers with a truly authentic task for either mathematics or CTE courses.

Material Type: Activity/Lab, Lesson Plan

# One is one ... or is it?

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One bag of apples, one apple, one slice of apple -- which of these is one unit? Explore the basic unit of math (explained by a trip to the grocery store!) and discover the many meanings of one.

Material Type: Lecture

Author: Christopher Danielson

# The Problem with Math is English - a chat with the author

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In this webinar, you will hear about several major concepts introduced in the book, The Problem with Math is English, further explained by the author, Concepcion "Como" Molina, EdD. The book can be purchased online at: http://www.sedl.org/pubs/catalog/item... SEDL offers professional development for college- and career-ready mathematics at: http://highperformingschools.sedl.org.

Material Type: Lecture

Author: Como Molina

# Beginning and Intermediate Algebra

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Beginning and Intermediate Algebra by Tyler Wallace is a textbook licensed under a Creative Commons Attribution 3.0 Unported License. There is also a student guide and supplemental videos for each section.

Material Type: Textbook

Author: Tyler Wallace

# Dan Meyer: Math class needs a makeover

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Today's math curriculum is teaching students to expect -- and excel at -- paint-by-numbers classwork, robbing kids of a skill more important than solving problems: formulating them. In his talk, Dan Meyer shows classroom-tested math exercises that prompt students to stop and think. (Filmed at TEDxNYED.)

Material Type: Lecture

Author: Dan Meyer

# 45-45-90 triangle

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An interactive applet and associated web page that demonstrate the properties of a 45-45-90 isosceles right 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 45 degrees, 45 degrees and 90 degrees The text on the page points out that the sides of a 45-45-90 triangle are always in the ratio of 1 : 2 : root 2 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.

Material Type: Reading, Simulation

Author: John Page

# Accurately Weighing Pennies I

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This problem involves solving a system of algebraic equations from a context: depending how the problem is interpreted, there may be one equation or two.

Material Type: Activity/Lab

Author: Illustrative Mathematics

# Deepening Understanding of the Order of Operations

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This unit is an EQuIP Exemplar for adult education (http://achieve.org/equip). Students will connect their prior, real-world knowledge to the concept of order in mathematics. They will go through a discovery process with content that will build a deep, conceptual understanding of the properties of operations to explain why we perform operations in a certain order when we see just the naked numbers.

Material Type: Lesson Plan, Unit of Study

Author: Connie Rivera

# Matching Fractions Decimals Percentages

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In this interactive Flash version of the familiar game Concentration ("pelmanism" in the UK) a single user practices finding equivalent forms of fractions, decimals and percents, while developing memory and focusing skills. The player can choose an array of 16, 20, or 24 cards, which appear face down. The goal is to flip two cards at a time to match all pairs of equivalent values as efficiently as possible. A scoring feature discourages random guessing. Printable versions of the game cards are available to download. The Teachers' Notes page offers suggestions for implementation, discussion questions, and ideas for support.

Material Type: Activity/Lab, Game, Interactive