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# Third Grade Mathematics Resources

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**Equivalent Halves | Cyberchase Games **

**Source: PBS Learning Media**

**Resource Type: Interactive**

Find thirteen ways to show one half by solving this brain teaser from Cyberchase.

*Skill: Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole. For example, partition a shape into 4 parts with equal area, and describe the area of each part as 1/4 of the area of the shape.*

*Georgia Standard: MGSE3.G.1*

**Source: PBS Learning Media**

**Resource Type: Video**

The Puppet Master has turned a bunch of people into puppets... including Olive and Otto! Can they set things right again before they're stuck as puppets forever?

*Skill: Tell and write time to the nearest minute and measure elapsed time intervals in minutes. Solve word problems involving addition and subtraction of time intervals in minutes, e.g., by representing the problem on a number line diagram, drawing a pictorial representation on a clock face, etc.*

*Georgia Standard: MGSE3.MD.1*

**Measuring: Martha in the Doghouse**

**Source: PBS Learning Media**

**Resource Type: Video**

Explore how mathematics can be used in construction with MARTHA SPEAKS. This video focuses on the importance of planning when problem solving and what it means to be an architect. After the video students can answer review questions in the interactive quiz.

*Skill: Generate measurement data by measuring lengths using rulers marked with halves **and fourths of an inch. Show the data by making a line plot, where the horizontal scale is marked **off in appropriate units— whole numbers, halves, or quarters.*

*Georgia Standard: MGSE3.MD.4*

**Measuring Length Precisely | Cyberchase**

**Source: PBS Learning Media**

**Resource Type: Video and Activity**

In this video segment from Cyberchase, the CyberSquad must remove a voice box from a giant statue of Hacker. The CyberSquad prepares to lower Digit down on a rope that will reach the voice box, but they need an exact measurement of the distance to the voice box so that Digit won’t touch the laser alarms which protect it. They try to figure out how long the rope must be by using what they know about other measurements and the relationships among them.

*Skill: Generate measurement data by measuring lengths using rulers marked with halves and fourths of an inch. Show the data by making a line plot, where the horizontal scale is marked off in appropriate units – whole numbers, halves, or quarters.*

*Georgia Standard: MGSE3.MD.4*

**Source: PBS Learning Media**

**Resource Type: Video**

In this video segment from Totally Rad, the CyberSquad figures out how changing the shape of the perimeter changes the area inside.

*Skill: Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters.*

*Georgia Standard: MGSE3.MD.8*

**Source: PBS Learning Media**

**Resource Type: Video and Practice**

Learn how to find the perimeter of various regular and irregular shapes by adding side-lengths.

*Skill: Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters.*

*Georgia Standard: MGSE3.MD.8*

**Perimeter: Comparing Areas and Perimeters of Rectangles**

**Source: PBS Learning Media**

**Resource Type: Video and Practice**

Students compare situations involving area and perimeters of rectangles, find areas and perimeters and solve problems.

*Skill: Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters.*

*Georgia Standard: MGSE3.MD.8*

**Rectangle Area Perimeter Word Problems**

**Source: PBS Learning Media**

**Resource Type: Activity**

If you know the area and perimeter of a rectangle, you can figure out the length and width.

*Georgia Standard: MGSE3.MD.8*

**Rounding: Examples - Rounding to the Nearest 10 and 100**

**Source: PBS Learning Media**

**Resource Type: Video and Practice**

Use these examples to practice rounding up to four-digit numbers to the nearest ten and hundred.

*Skill: Use place value understanding to round whole numbers to the nearest 10 or 100.*

*Georgia Standard: MGSE3.NBT.2*

**Fractions on a Number Line: The Basics**

**Source: PBS Learning Media**

**Resource Type: Video and Practice**

Students explore fractions as numbers on a number line.

*Skills: Understand a fraction as a number on the number line; represent fractions on a number line diagram.*

*Represent a fraction 1/b on a number line diagram by defining the interval from 0 to 1 as the whole and partitioning it into b equal parts. Recognize that each part has size 1/b and that the endpoint of the part based at 0 locates the number 1/b on the number line.*

*Represent a fraction a/b on a number line diagram by marking off a lengths 1/b from 0. Recognize that the resulting interval has size a/b and that its endpoint locates the number a/b on the number line.*

*Georgia Standards: MGSE3.NF.2, MGSE3.NF.2a, MGSE3.NF.2b*

**Equivalent Fractions Visually and on a Number Line**

**Source: PBS Learning Media**

**Resource Type: Video and Practice**

Students are taught how to interpret fractions where the denominator describes the number of equal parts and the numerator describes how many of those parts one has. They are also introduced to naming equivalent fractions by dividing a circle. This Cyberchase activity is motivated by an episode in which the CyberSquad creates a recipe for an antidote to MotherBoard's virus.

*Skill: Explain equivalence of fractions through reasoning with visual fraction models. Compare fractions by reasoning about their size.*

*Georgia Standard: MGSE3.NF.3*

**Source: PBS Learning Media**

**Resource Type: Video**

In this video segment from Cyberchase, Bianca is babysitting two young girls on Halloween. When their mother is late, she has to take them trick-or-treating even though it is her birthday. To thank her, the girls combine their Halloween candy and then share it equally amongst themselves and Bianca.

*Skill: Interpret whole number quotients of whole numbers, e.g., interpret 56 ÷ 8 as the number of objects in each share when 56 objects are partitioned equally into 8 shares (How many in each group?), or as a number of shares when 56 objects are partitioned into equal shares of 8 objects each (How many groups can you make?).*

*Georgia Standard: MGSE3.OA.2*

**Source: PBS Learning Media**

**Resource Type: Video**

In this video segment from Cyberchase, Buzz, Delete, and Harold are trying to share 18 pieces of candy equally among themselves. Jackie helps them by demonstrating how to divide the candies equally by distributing the candies in rounds.

*Skill: Interpret whole number quotients of whole numbers, e.g., interpret 56 ÷ 8 as the number of objects in each share when 56 objects are partitioned equally into 8 shares (How many in each group?), or as a number of shares when 56 objects are partitioned into equal shares of 8 objects each (How many groups can you make?).*

*Georgia Standard: MGSE3.OA.2*

**Source: PBS Learning Media**

**Resource Type: Lesson Plan With Media Links to Video, Practice, and Assessments**

The students learn about body matches, measuring one part of the body using another body part. They learn about non-standard measures and relative measurement. Students use multiplication and division concepts to solve problems presented in the video. This activity is motivated by a Cyberchase episode in which the CyberSquad must act as crime scene experts to find out who kidnapped Chewcrocca, a giant cybercrocodile.

*Skill: Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem. See Glossary: Multiplication and Division Within 100.*

*Georgia Standard: MGSE3.OA.3*

**Concept of Multiplication and Division: The Idea of Division**

**Source: PBS Learning Media**

**Resource Type: Video and Practice**

Students learn how to use an array and an understanding of multiplication to divide.

*Skill: Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem. See Glossary: Multiplication and Division Within 100.*

*Georgia Standard: MGSE3.OA.3*

**Source: PBS Learning Media**

**Resource Type: Lesson Plan With Media Links to Video, Practice, and Assessments**

Students are introduced to multiplication as repeated addition. They are encouraged to build tables and use patterns. They are also encouraged to use multiplication by 10 or 100 for larger values, as the beginnings of commutativity and distribution are introduced informally but yet not named. This activity is motivated by a Cyberchase episode in which Delete is sneezing to produce clones, and cowboy Cy-Clone is sweeping them up.

*Skill: Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem. See Glossary: Multiplication and Division Within 100.*

*Georgia Standard: MGSE3.OA.3*