Better Lesson
Better Lesson: Fun With Four: Decomposing to Known Factors of 1, 2, and 5
Third graders act as problem solvers to take an unknown fact and solve it by breaking it down into pieces that are known.
Better Lesson
Better Lesson: Filling Shadows With More and Less
First graders use their understanding of composing and decomposing shapes to cover a given area. Today's lesson is bringing together many of the geometric skills from previous lessons.
Khan Academy
Khan Academy: Decompose Angles
Find an angle's measure when given the measures of its parts. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Illustrative Mathematics
Illustrative Mathematics: 3.md Three Hidden Rectangles
The purpose of this task is for students to decompose a figure into rectangles and then find the total area by adding the area of all of its smaller, non-overlapping rectangles. Aligns with 3.MD.C.7.d.
Other
Hub Pages: Biotic Factors of Ecosystem: Producers, Consumers and Decomposers
An ecosystem is composed of biotic factors of a community of living organisms interacting with one another which we can see in food chains/webs. These diverse organisms stay together because of the need of food. Population is referred to...
Khan Academy
Khan Academy: Area Challenge
Practice solving problems involving triangles, parallelograms, and composite figures. Exercises include decimals, fractions, and word problems. Area of circles is not included. Students receive immediate feedback and have the opportunity...
Illustrative Mathematics
Illustrative Mathematics: 2.nbt Three Composing/decomposing Problems
In this lesson plan students use base ten blocks to explore place value.
NumberNut
Number Nut: Subtraction: Borrowing
Explains the concept of 'borrowing' in subtraction, also known as regrouping or decomposing numbers.
ArtsNow
Arts Now Learning: Module K: Shapes
In this series of STEAM activities, students will discover the concepts of geometry through shape exploration and the creation of choreographic sequences. Another activity in this module will allow students to identify shapes by applying...
ArtsNow
Arts Now Learning: Moving Shapes [Pdf]
These activities will allow students to discover the concepts of geometry through shape exploration and the creation of choreographic sequences.
ArtsNow
Arts Now Learning: Self Portraits With the Touch of a Finger [Pdf]
In this lesson, young scholars will explore self-portraiture by looking at classical portrait paintings, such as Diego Velazquez's La Infanta Margarita or Raphael's Portrait of Baldassare Castiglione. A close look at these works reveals...
National Council of Teachers of Mathematics
Nctm: Illuminations: Shape Cutter
This computer tool allows students to compose and decompose shapes by making cuts and rearranging the pieces. The tool has an exploration section for learning exercises.
Illustrative Mathematics
Illustrative Mathematics: k.oa What's Missing?
Students will practice composing and decomposing numbers with this quick game. Show the student 6 counters. Ask the student to close his/her eyes. Hide some of the counters under a sheet of heavy paper. When the student opens his/her...
NumberNut
Number Nut: Subtraction: Two Digit Subtraction With Borrowing
A quiz for practicing subtraction with two-digit numbers where there is regrouping.
NumberNut
Number Nut: Subtraction: Three Digit Subtraction With Borrowing
A quiz for practicing subtraction with three-digit numbers where there is regrouping.
Illustrative Mathematics
Illustrative Mathematics: Grandfather Tang's Story
The purpose of this task is for students to compose two-dimensional shapes to create a composite shape using tangram pieces. The teacher will read "Grandfather Tang's Story" and the students will use tangrams to compose the animals from...
Sophia Learning
Sophia:multiplying With Decomposition
The video lesson examines multiplying using decomposition. Detailed examples investigate the multiplication technique.
Illustrative Mathematics
Illustrative Mathematics: What Makes a Teen Number?
Learners will learn about teen numbers by understanding the base-ten structure of teen numbers. They will fill-in a 10-frame and a blank equation as they complete the activity. Worksheet included.
TED Talks
Ted: Ted Ed: One Is One, or Is It?
This animated video explores the basic unit of one and its different meanings depending on place value. [3:55]
PBS
Pbs Kids: Dinosaur Train Track Star
Build a train by dragging shapes into a rectangle. Choose your level from easy (outline of shapes given) to hard (no outline of shapes).
Starfall
Starfall: Puzzles
In this interactive students click on one of the black statues to break them down into shapes; then they reconstruct the statue by putting the puzzle pieces together, which shows the animal that it represents and replaces the statues...
Alabama Learning Exchange
Alex: Guess My Shape
The students will make the connection between 2-D and 3-D shapes using modeling clay and geometric solids and participate in an interactive web lesson. Students will make predictions about what 2-D shape they think will be made when they...
Alabama Learning Exchange
Alex: Fishy Addition!
In this activity, learners will use manipulatives to act out and solve simple addition problems.
NumberNut
Number Nut: Addition: Carrying
Explains how to carry when regrouping in addition, with related activities for skill practice.