# Arithmetic and Pre-Algebra: Number Sets 1

This video looks at Number Sets 1

- Subject:
- Mathematics and Statistics
- Material Type:
- Video Lectures
- Provider:
- Khan Academy
- Provider Set:
- Khan Academy
- Author:
- Sal Khan

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This video looks at Number Sets 1

- Subject:
- Mathematics and Statistics
- Material Type:
- Video Lectures
- Provider:
- Khan Academy
- Provider Set:
- Khan Academy
- Author:
- Sal Khan

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Do you remember which is the numerator and which is the demonimator ... (more)

Do you remember which is the numerator and which is the demonimator of a fraction? This lesson will clarify the difference and provide a review of how to identiry the numerator and denominator of a fraction. (less)

- Subject:
- Mathematics and Statistics
- Material Type:
- Video Lectures
- Provider:
- Khan Academy
- Provider Set:
- Khan Academy
- Author:
- Khan, Salman

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This video looks at Finding common denominators of multiple fraction to order ... (more)

This video looks at Finding common denominators of multiple fraction to order them (less)

- Subject:
- Mathematics and Statistics
- Material Type:
- Video Lectures
- Provider:
- Khan Academy
- Provider Set:
- Khan Academy
- Author:
- Sal Khan

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This video looks at worked examples ordering mixed numbers and improper fractions

- Subject:
- Mathematics and Statistics
- Material Type:
- Video Lectures
- Provider:
- Khan Academy
- Provider Set:
- Khan Academy
- Author:
- Sal Khan

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What is the difference between a proper and an improper fraction? This ... (more)

What is the difference between a proper and an improper fraction? This lesson reviews the difference between these two kinds of fractions. (less)

- Subject:
- Mathematics and Statistics
- Material Type:
- Video Lectures
- Provider:
- Khan Academy
- Provider Set:
- Khan Academy
- Author:
- Khan, Salman

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This lesson discusses the fraction as a ratio and shows how to ... (more)

This lesson discusses the fraction as a ratio and shows how to write it in is simplest form. (less)

- Subject:
- Mathematics and Statistics
- Material Type:
- Video Lectures
- Provider:
- Khan Academy
- Provider Set:
- Khan Academy
- Author:
- Khan, Salman

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This lesson shows how to write a percent as a decimal and ... (more)

This lesson shows how to write a percent as a decimal and a fraction. (less)

- Subject:
- Mathematics and Statistics
- Material Type:
- Video Lectures
- Provider:
- Khan Academy
- Provider Set:
- Khan Academy
- Author:
- Khan, Salman

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This lesson reviews how to write a fraction as a decimal and ... (more)

This lesson reviews how to write a fraction as a decimal and a percentage. (less)

- Subject:
- Mathematics and Statistics
- Material Type:
- Video Lectures
- Provider:
- Khan Academy
- Provider Set:
- Khan Academy
- Author:
- Khan, Salman

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This lesson discusses converting units of measurement into fractions.

- Subject:
- Mathematics and Statistics
- Material Type:
- Video Lectures
- Provider:
- Khan Academy
- Provider Set:
- Khan Academy
- Author:
- Khan, Salman

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This webpage for math students and their teachers offers a searchable archive ... (more)

This webpage for math students and their teachers offers a searchable archive of questions and answers about fractions and decimals at the elementary level. Equivalent fractions, common denominators, all four operations, fraction and decimal conversions, and other topics are included. (less)

- Subject:
- Mathematics
- Education
- Material Type:
- Reference
- Provider:
- Maryland Public Television
- Provider Set:
- Mathlanding: Elementary Mathematics Pathway
- Author:
- The Math Forum @ Drexel

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In this activity, learners create a model using metric measuring tapes and ... (more)

In this activity, learners create a model using metric measuring tapes and atmosphere composition data. Learners will investigate the major components of the atmosphere (nitrogen and oxygen) as well as the minor components which raise questions about global warming and greenhouse gases. (less)

- Subject:
- Mathematics
- Chemistry
- Ecology
- Engineering
- Forestry and Agriculture
- Geoscience
- Life Science
- Physics
- Technology
- Social Sciences
- Education
- Material Type:
- Activities and Labs
- Data
- Instructional Material
- Provider:
- Science and Math Informal Learning Educators (SMILE)
- Provider Set:
- SMILE Pathway: Science and Math Activities in One Search
- Author:
- Lori Lambertson
- The Exploratorium

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In this activity, learners explore atoms as the smallest building blocks of ... (more)

In this activity, learners explore atoms as the smallest building blocks of matter. With adult help, learners start by dividing play dough in half, over and over again. Then they use a notebook (a few small squares of paper with 2 staples along one edge) and start folding the pages in half. Magnets and play dough are used to model the proton and electron cloud of an atom, and two play dough hydrogen atoms are "bonded" together to form a molecule. Intermolecular bonds between water molecules in different phases, physical changes, and chemical changes in the kitchen are also introduced. This activity was designed as a kit that could be checked out of the library, but the kit is not required. (less)

- Subject:
- Mathematics
- Science and Technology
- Chemistry
- Engineering
- Geoscience
- Life Science
- Physics
- Technology
- Education
- Material Type:
- Activities and Labs
- Data
- Instructional Material
- Provider:
- Mount Holyoke College
- Science and Math Informal Learning Educators (SMILE)
- Provider Set:
- SMILE Pathway
- SMILE Pathway: Science and Math Activities in One Search
- Author:
- Camille and Henry Dreyfus Foundation, Inc.
- Maisie Shaw
- Maria Gomez
- Mount Holyoke College

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This 5-minute professional development video clip shows students engaged in the Common ... (more)

This 5-minute professional development video clip shows students engaged in the Common Core Practice Standard #6, as students explore fractions through fraction strips and a game. The learners attend to precision in terms of accurately adding fractions to one exact whole, communicating their ideas clearly, and recording results. Additional resources include a video transcript, teaching tips, and a link to a professional development reflection activity based upon the video. (less)

- Subject:
- Mathematics
- Chemistry
- Life Science
- Education
- Material Type:
- Instructional Material
- Teaching and Learning Strategies
- Provider:
- Maryland Public Television
- Provider Set:
- Mathlanding: Elementary Mathematics Pathway
- Author:
- WGHB Boston

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In this Science NetLinks lesson plan, students learn to see numerical relationships ... (more)

In this Science NetLinks lesson plan, students learn to see numerical relationships and how to solve complex problems by manipulating objects (beans) and solving equations. Working with a partner, students pack 8 bean bags (sandwich bags) by reading each rule and figuring out how many beans of each kind (red, lima and black) go in each bag; learners record answers in a table. For some bags there is only one possible solution, while for others there are several correct answers. Students can develop confidence in their answers even when they differ from those of their classmates. (less)

- Subject:
- Mathematics
- Chemistry
- Life Science
- Education
- Material Type:
- Activities and Labs
- Instructional Material
- Lesson Plans
- Provider:
- Maryland Public Television
- Provider Set:
- Mathlanding: Elementary Mathematics Pathway

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This activity helps learners learn about math through a real-world scenario. Three ... (more)

This activity helps learners learn about math through a real-world scenario. Three friends are baking cookies for their schooläóťs bake sale. Using real or pretend cookies and plates, learners figure out how many plates they need to fit a certain number of cookies. Then they calculate how many batches of cookies they need to make for the bake sale. This activity guide includes questions to ask, extensions, resources, standards, and blackline masters. (less)

- Subject:
- Mathematics
- Education
- Material Type:
- Activities and Labs
- Instructional Material
- Lesson Plans
- Provider:
- Science and Math Informal Learning Educators (SMILE)
- Provider Set:
- SMILE Pathway: Science and Math Activities in One Search
- Author:
- Children's Museum of Houston
- Children's Museum Of Houston

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This word problem requires students to use fractions to solve it.

- Subject:
- Mathematics and Statistics
- Mathematics
- Education
- Material Type:
- Activities and Labs
- Instructional Material
- Provider:
- Illustrative Mathematics
- Institute for Mathematics and Education
- Provider Set:
- Illustrative Mathematics
- Illustrative Mathematics
- Author:
- Illustrative Mathematics

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In this activity, learners measure the diameter of their water balloons, model ... (more)

In this activity, learners measure the diameter of their water balloons, model an impact, measure the diameter of the äóěcrateräó area, and determine the ratio of impactor to crater. This activity is best suited for the outdoors, in an area where there is plenty of concrete but no cars. (less)

- Subject:
- Mathematics
- Geoscience
- Space Science
- Social Sciences
- Education
- Material Type:
- Activities and Labs
- Data
- Instructional Material
- Lesson Plans
- Provider:
- Science and Math Informal Learning Educators (SMILE)
- Provider Set:
- SMILE Pathway: Science and Math Activities in One Search
- Author:
- Lunar and Planetary Institute

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The purpose of this task is to provide students with a concrete ... (more)

The purpose of this task is to provide students with a concrete situation they can model by dividing a whole number by a unit fraction. (less)

- Subject:
- Mathematics and Statistics
- Mathematics
- Education
- Material Type:
- Activities and Labs
- Instructional Material
- Provider:
- Illustrative Mathematics
- Institute for Mathematics and Education
- Provider Set:
- Illustrative Mathematics
- Illustrative Mathematics
- Author:
- Illustrative Mathematics

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Students will learn the concepts behind fractions, decimals, and percents by using ... (more)

Students will learn the concepts behind fractions, decimals, and percents by using sports statistics found on baseball cards. A lesson plan for grade 8 Mathematics. (less)

- Subject:
- Science and Technology
- Material Type:
- Lesson Plans
- Provider:
- University of North Carolina at Chapel Hill School of Education
- Provider Set:
- LEARN NC Lesson Plans
- Author:
- Adrian Bustle

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Using batting averages, students will create ratios and convert them to rounded ... (more)

Using batting averages, students will create ratios and convert them to rounded decimals (3 places). In addition, they will take decimals and determine several possible equivalent ratios. Then using the relationship that batting average = hits/at bats, the students can use proportions or equations to find either the number of hits or the number of at bats for a given situations. (less)

- Subject:
- Mathematics
- Material Type:
- Activities and Labs
- Instructional Material
- Provider:
- NSDL Staff
- Provider Set:
- Developmental Mathematics Collection