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Lesson Plan
Curated OER

Unequal Groups vs. Equal Groups

For Teachers 3rd
Third graders create their own chenille stems to use during this and future lessons. As a class, they discuss the difference between equal and non-equal groups. In groups, they brainstorm a list of items that come in groups of two,...
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Worksheet
Curated OER

Addition: Grouping Property

For Students 3rd - 4th
In this using the grouping property to add worksheet, students find the sum of one side and fill in the blank to make the other side of the equation equal. Students solve six problems.
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Lesson Plan
Curated OER

How Many Buttons

For Teachers K
Help learners explore the concepts of more than, less than, and equal to. They participate in a button attribute activity, play a game using buttons and a die, draw the sets of buttons in their journal, and play button bingo.
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Worksheet
Curated OER

One and Tens Place Value - Step-by-Step Lesson

For Students 1st - 3rd
Give your pupils a grasp of place value in a two-digit number. They see a drawing of counting cubes in a stick of ten, then examine a set of four. Mathematicians determine how many blocks there are by grouping the tens. Ideally, you will...
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Lesson Plan
Curated OER

Cuisenaire Mats

For Teachers 1st
First graders use Cuisenaire rods to study the mathematical symbols =, <, > for the relationships is equal to, is less than, and is greater than. They use the rods to show visual explanations of common number combinations.
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Worksheet
Curated OER

Ones and Tens Place Value

For Students 1st - 3rd
As scholars examine place value, these exercises help them incorporate addition and grouping. First, they answer three missing-addend questions, each with 10 as the given addend. Because all of the missing numbers are single-digit, this...
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Worksheet
Curated OER

Equal or Not Equal

For Students K
Tiny mathematicians count the number of shapes (up to 8) in pairs of object groups and identify the sets as equal or not equal. Five practice problems. They also draw 2 groups of shapes that are not equal. A focused tool that requires...
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PPT
Curated OER

Dividing Using Groups

For Teachers 3rd - 4th
Three simple slides show the relationship between division and multiplication. Items are grouped into equal sets based on the division problem presented, then related to repeated addition and multiplication.
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Lesson Plan
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Illustrative Mathematics

Equal Area Triangles on the Same Base II

For Teachers 9th - 12th Standards
A deceptively simple question setup leads to a number of attack methods and a surprisingly sophisticated solution set in this open-ended problem. Young geometers of different strengths can go about defining the solutions graphically,...
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Activity
Education Development Center

Interpreting Statistical Measures—Class Scores

For Students 9th - 12th Standards
Explore the effect of outliers through an analysis of mean, median, and standard deviation. Your classes examine and compare these measures for two groups. They must make sense of a group that has a higher mean but lower median compared...
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Lesson Plan
Curated OER

More and Less Handfuls

For Teachers K Standards
Working as a pair, two kindergartners will sit at a table and will pick two handfuls of counters. They will combine their individual handfuls into one, and count their own selection. They will then draw and record their count on a record...
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Interactive
CK-12 Foundation

Data Summary and Presentation: Chart for Grouping Data

For Students 7th - 12th Standards
Get social! Create a display of social media use for a class. Pupils use provided information about the time spent on social media to construct a histogram. Using the histogram, learners interpret the data to answer questions.
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Interactive
CK-12 Foundation

Repeating Decimals: Does 1 equal 0.999... ?

For Students 6th - 8th Standards
Six questions make up a challenging interactive that tests scholars' knowledge of repeating decimals. Mathematicians answer true or false and multiple-choice questions with help from a tool that highlights decimal movement in an...
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Worksheet
Curated OER

Model Repeated Groups

For Students 2nd - 3rd
In this repeated groups worksheet, students use equal-shares drawing to solve a word problem, analyze and explain the process, make equal share drawings for 30 marbles and "explore it."
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Assessment
Illustrative Mathematics

Counting Dots in Arrays

For Students 2nd Standards
Mathematical arrays can represent several different math skills, including counting groups, multiplication, and even area. In this specific task, learners are asked to identify the addition equations that are equal to a 3 x 4 array....
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Worksheet
Curated OER

Unit 8 Algebra: Brackets

For Students 8th - 10th
In this expansions worksheet, students use area to solve expansions of brackets problems. There are 4 of this type, each problem having less guidance than the previous. The second activity asks students to solve magic square puzzles...
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Worksheet
Fuel the Brain

Equal Grouping

For Students 3rd
Using division can be challenging for some young learners. However, these problems that are simple division without remainders, are designed to help your learners both conceptualize and visualize the problem before solving.
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Lesson Plan
Illustrative Mathematics

Fruit Salad

For Teachers 5th - 7th Standards
Playing with values in this fruit salad problem allows learners to find out how many cherries were mixed in. Your middle schoolers can organize their thoughts in a chart before going into the equation. Eigth graders can skip the chart...
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Lesson Plan
EngageNY

The Difference Between Theoretical Probabilities and Estimated Probabilities

For Teachers 7th Standards
Flip a coin to determine whether the probability of heads is one-half. Pupils use simulated data to find the experimental probability of flipping a coin. Participants compare the long run relative frequency with the known theoretical...
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Lesson Plan
EngageNY

Estimating Centers and Interpreting the Mean as a Balance Point

For Teachers 9th - 10th Standards
How do you balance a set of data? Using a ruler and some coins, learners determine whether the balance point is always in the middle. Through class and small group discussions, they find that the mean is the the best estimate of the...
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Activity
Education Development Center

Rectangles with the Same Numerical Area and Perimeter

For Students 8th - 9th Standards
Is it possible for a rectangle to have the same area and perimeter? If you disregard units, it happens! In a challenging task, groups work to determine the rectangles that meet these criterion. The hope is that learners will naturally...
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Lesson Plan
Curated OER

Initial Fraction Ideas Lesson 15: Overview

For Teachers 5th - 6th
Observe fraction numerators and denominators to determine if they are less than or equal to 1/2. In this fractions lesson plan, students simplify fractions and determine their relationship to 1/2.
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Lesson Plan
Curated OER

Let's Count to 20

For Teachers Pre-K - 2nd
Budding mathematicians create groups of 10 to 20 objects using numerals to record the size of a group. They construct sets of numbers up to 10, write the numerals up to 10, and count up to 10 rationally. Learners also use ten frames and...
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Lesson Plan
Curated OER

Team Up

For Teachers K - 2nd
Learners discover how to break into equal teams. In this dividing instructional activity, students break different numbers of people into equal groups. Learners draw pictures to represent their division and discuss what to do when an...

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