Curated OER
Fact Families
In this fact family worksheet, 1st graders complete 4 sets of blanks that show addition and subtraction fact families. They examine 3 sets of numbers and determine which one shows the fact families that go with the numbers 5, 2, and 7.
Illustrative Mathematics
Kiri's Mathematics Match Game
Learning math is so much more fun when it involves playing games. Following the rules of the classic game Memory, young mathematicians flip over two cards at a time as they look for numbers whose sum or difference is equal to the value...
Curated OER
Developing Strategies for Addition and Subtraction
Primary graders develop strategies to assist them with addition and subtraction. They discover number combinations and numerical facts which enable them to add and subtract more effectively. Students use these techniques to complete...
Curated OER
Subtraction with Regrouping Lesson Plan
Learners explore regrouping while subtracting. In this subtraction lesson plan, pupils manipulate base 10 blocks to demonstrate regrouping. Multiple resources are provided.
Curated OER
Twelve Days of Christmas--Prediction, Estimation, Addition, Table and Chart
Scholars explore graphing. They will listen to and sing "The Twelve Days of Christmas" and estimate how many gifts were mentioned in the song. Then complete a data chart representing each gift given in the song. They also construct...
Curated OER
Alexander Used to Be Rich
Reading Alexander, Who Used to Be Rich Last Sunday, launches this lesson appropriate for children who recognize coins and have been introduced to coin values. Using addition and subtraction skills, the class tracks Alexander’s spending...
Illustrative Mathematics
Sum and Difference Angle Formulas
Need practice deriving trigonometric angle formulas? With this worksheet, pupils derive the sum and difference formulas for cosine and tangent and the difference formula for sine. Scholars use the sine sum formula and other known...
Laboratory for Atmospheric and Space Physics
Jupiter’s Relative Size
How do you properly illustrate the extreme size difference between two planets—Earth and Jupiter? With the help of jellybeans, of course! Create a scale model of Jupiter's mass compared to Earth using a fishbowl, 1,400 beans, and a dixie...
Curated OER
Relate Counting to Addition and Subtraction
Find 10 simple word problems that require addition and subtraction skills. Although these offer clear math procedure, the grammar isn't perfect. The highest number your learners encounter here is 40, and each question has room for...
Curated OER
Using Addition To Subtract
In this addition and subtraction worksheet, 2nd graders solve 9 subtraction problems and find the missing digit in 9 addition problems.
Curated OER
Fact Families
In this mathematics worksheet, 1st graders create a fact family that uses specific numbers given. Then they draw eight circles, add five more, and write the fact out in a problem.
Curated OER
Addition: Number Bonds to 40
In this addition and subtraction instructional activity, learners use their problem solving skills to solve 41 problems as they fill in the missing numbers in each of the problems.
Curated OER
Easier Way to Subtract
In this subtraction review worksheet, young scholars read about the Tic Tac Toe method for subtraction and then use the method to solve some problems.
Curated OER
Names for Numbers
In this mathematics worksheet, 1st graders identify various numbers and use counters to illustrate each fact given. Then they complete the math sentences correctly.
Curated OER
Relate Addition and Subtraction Enrichment 14.7
In this addition and subtraction worksheet, students solve 3 problems in which lines are drawn to match the pictures to the number sentences in the same fact family. Students solve the problems.
Curated OER
Far Out Fact Families
Second graders explore related multiplication and division facts. They study the inverse relationship of multiplication and division and engage in a group discussion about families. They complete a web-based lesson plan which is imbedded...
Curated OER
Fraction Facts
Middle schoolers explore the concept of fractions. In this fractions lesson, students perform basic operations such as addition and subtraction with fractions. Middle schoolers play a game on the computer called 'Fraction Four' that...
Curated OER
Family at Home
Students fold paper to form a house, then use three numbers to make fact families for their houses. They write a family of multiplication and division facts on a piece of paper cut in the shape of a house.
Curated OER
Triangle Town
Second graders create a fact family town to develop the understanding of numbers related in fact families. They learn each family has a big number and two baby numbers. They make triangle shaped houses for their facts.
Pennsylvania Department of Education
Practice Makes Perfect
Students study fact families. In this math activity, students use fact families to play a game of concentration. Students identify subtraction facts they need to learn.
Curated OER
Sum and Difference angle formulas
Learners use the sum angle formula for sine to derive the sum and difference formulas for cosine and tangent. The level of difficulty is quite high. Learners must be familiar with trigonometric identities as well as the characteristics...
Curated OER
Fact vs. Opinion: Theory, Hypothesis, and Bias
Emphasize the differences between a theory and a hypothesis to teach your class how to avoid scientific bias.
Curated OER
Inverse Relationship Between Addition and subtraction
First graders review number facts to illustrate the relationship between addition and subtraction. In this inverse relationship lesson, 1st graders write an addition sentence and then invert the numbers to show the subtraction fact.
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.