K20 LEARN
Break It Apart: Multiplication Strategies
Reinforce multiplication strategies with a lesson that examines a word problem and the distributive property. Mathematicians work collaboratively to solve the problem, create a poster with their solution, and share their preferred method...
Illustrative Mathematics
Listing Fractions in Increasing Size
Increase the depth of your class's fractional number sense with this number-ordering activity. Given four fractions, each with different numerators and denominators, young learners are asked to place them in order from smallest to...
EngageNY
Interpreting and Computing Division of a Fraction by a Fraction—More Models
Use a unit approach in developing a fraction division strategy. The teacher leads a discussion on division containing units, resulting in a connection between the units and like denominators. Pupils develop a rule in dividing fractions...
Curated OER
New York City Delights: The Taxi Cab
You set the rate! Step into the shoes of a taxi driver in New York City, and also pretend to be a person who uses taxis to get around town. The class will conduct collaborative research to learn about the history of taxis. Then, they...
Curated OER
Fractions, Decimals, and Percents Got You Down? "Tri" This!
Have your class design their own mathematical study aids. Learners collaborate in groups on the design of tri-fold presentation describing the relationships between mathematical computations. Then, they write a business letter to the...
Illustrative Mathematics
Dan’s Division Strategy
Can Dan make a conjecture about dividing fractions with the same denominators? That is what your scholars are to determine. They must show that if the statement is true, they understand how the quantities were determined, and how the...
Curated OER
Out of the Dust: Questioning Strategies
Bloom's Taxonomy is a great way to address the many levels of comprehension. With explanations and examples of each level, you can create questions that focus on knowledge, comprehension, application, analysis, synthesis, and evaluation.
Curated OER
An Introduction to Data Reading and Computations
Students discover data reading and computations. In this math lesson plan, students collect nutritional data about intakes of certain foods compared with daily recommended allowances. Students create their own data charts based on their...
Curated OER
Subtraction-There's Got to be An Easier Way!
Third graders observe and demonstrate a variety of problems involving subtraction problems using mental math strategies. They discuss the base ten system and the basic concept of subtraction, and complete a variety of activities...
EngageNY
Mental Math
Faster than a speedy calculator! Show your classes how to use polynomial identities to multiply numbers quickly using mental math.
Curated OER
Math 5 - Act. 01: Multiplication Strategy Review
Fifth graders play a game to practice all of the strategies for multiplication they have memorized.
Museum of Tolerance
Why is This True?
Are wages based on race? On gender? Class members research wages for workers according to race and gender, create graphs and charts of their data, and compute differences by percentages. They then share their findings with adults and...
EngageNY
The Division Algorithm—Converting Decimal Division into Whole Number Division Using Mental Math
Make math much simpler with mental math methods. The 16th installment in a series of 21 looks at ways scholars can apply mental math to convert division problems into easier problems with the same quotient. Multiplying or dividing both...
Curated OER
Addition and Subtraction
Students develop their own strategies to solve basic addition and subtraction facts. In this addition and subtraction lesson plan, students use strategies they already know and new ones to solve problems.
The New York Times
Understanding the Mathematics of the Fiscal Cliff
What exactly is the fiscal cliff? What are the effects of changing income tax rates and payroll tax rates? Your learners will begin by reading news articles and examining graphs illustrating the "Bush tax cuts" of 2001 and 2003. They...
Curated OER
Multiplication Strategies and Writing Story Problems
Third graders model multiplication problems using Unifix cubes. They compute and solve problems involving addition and subtraction of 3- and 4- digit numbers and basic facts of multiplication and division. They practice mental math...
Curated OER
Dividing by 3's
Third graders review and practice strategies for solving division problems. In this division by 3's instructional activity, 3rd graders play games, use an interactive whiteboard, create flashcards, and solve word problems.
Curated OER
Dividing by 4's
Third graders explore math functions by completing problem solving activities. In this division lesson, 3rd graders utilize the division strategies acquired earlier to divide multiple digit numbers by 4's. Students complete problems on...
Curated OER
Soak It Up
Learners role play where they assume the role of business executives who must decide which of three prototypes of paper towels would be the best buy for consumers. Students compare three products to determine the best value by using...
Curated OER
Life is Full of Problems
Pupils use the problem solving strategy of guess and check to investigate math word problems. They determine which problem solving strategy or strategies would work best in problem situations.
Curated OER
Computation with Fractions
Upper graders are introduced to the topic of fractions and percentages. In groups, they discuss real world situations in which fractions are present, and they complete a worksheet solving problems with common and uncommon denominators....
Curated OER
Pattern Puzzles
A short video introduces place value in addition and subtraction. As a class, your students identify all even numbers up to one hundred and explain the pattern. They use addition strategies to fill in the missing numbers on the number grid.
Curated OER
Make a Match
Second graders examine the relationship between addition and subtraction. In this number sense lesson, 2nd graders practice their computation skills and use various strategies (including manipulatives and calculators) to add and subtract.
Curated OER
Fiddle Dee Diddle - It's Time For A Riddle
Energize your math class! They will use the story problem process to solve math riddle problems. They compute and solve problems involving addition and subtraction of 3- and 4- digit numbers and basic facts of multiplication and division...