Khan Academy
Khan Academy: Multiply 2 Digits Numbers With Area Models
Use an area model to decompose factors and multiply. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Illustrative Mathematics
Illustrative Mathematics: 2.nbt Three Composing/decomposing Problems
In this lesson plan students use base ten blocks to explore place value.
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.
Illustrative Mathematics
Illustrative Mathematics: k.oa Shake and Spill
The purpose of this task is for students to decompose a number as a sum of two other numbers in more than one way. Students will shake and spill 5 two colored counters and determine how many of each color is showing and record the sum...
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: Borrowing
Explains the concept of 'borrowing' in subtraction, also known as regrouping or decomposing numbers.
K-5 Math Teaching Resources
K 5 Math Teaching Resources: 2 Digit Addition Split [Pdf]
Students will decompose double digit numbers to add numbers together.
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...
Other
The Math Learning Center: Pattern Shapes
Students use pattern shapes to explore geometry and fractions, creating their own designs, or filling in outlines. As they work with the shapes students explore geometric relationships, think about angles, investigate symmetry, and...
University of Canterbury
Cs Unplugged: Divide and Conquer
Imagine 31 numbers have been organized in ascending order in a list by a computer program. Now the program has to find a number in the list, but it can only look at one number at a time. Is it easier to find the number now, than if they...
NumberNut
Number Nut: Subtraction: Three Digit Subtraction With Borrowing
A quiz for practicing subtraction with three-digit numbers where there is regrouping.
Alabama Learning Exchange
Alex: Fishy Addition!
In this lesson plan, students will use manipulatives to act out and solve simple addition problems.
Louisiana Department of Education
Louisiana Doe: Louisiana Believes: Eureka Math Parent Guide: Analyzing, Comparing, and Composing Shapes
A guide to support parents as they work with their students in analyzing, comparing, and composing shapes.
ClassFlow
Class Flow: Breaking 10 Apart
[Free Registration/Login Required] This is an interactive lesson that encourages students to move around. It focuses on the students being able to recognize that numbers are the same even if you break them apart into groups. This lesson...
Khan Academy
Khan Academy: Multiply 2 , 3 , and 4 Digits by 1 Digit With Area Models
Use an area model to decompose the larger factor and multiply. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
TeachEngineering
Teach Engineering: Digest Your Food!
In a multi-week experiment, student teams gather biogas data from the mini-anaerobic digesters that they build to break down different types of food waste with microbes. They compare methane gas production from decomposing hot dogs,...
Other
West Contra Costa Usd: Volume: A Foundation in Unit Cubes [Pdf]
A very detailed lesson on determining the volume of rectangular prisms, teaching young scholars how to derive the formula for volume, and to use it successfully. Plenty of examples, student work, and assessment options.
K-5 Math Teaching Resources
K 5 Math Teaching Resources: Subtraction Split [Pdf]
Students draw a card then decompose the given numbers before subtracting them.
Illustrative Mathematics
Illustrative Mathematics: 4.nf Making 22 Seventeenths in Different Ways
This task is a straightforward task related to adding fractions with the same denominator. The main purpose is to emphasize that there are many ways to decompose a fraction as a sum of fractions, similar to decompositions of whole...
Better Lesson
Better Lesson: Multiply and Divide by 10
Counting by 10's is easy for students of this age. Knowing that base 10 can be used to help multiply and divide in the higher numbers by decomposing is critical. This lesson sets the base for future work.