Curated OER
Adjusting the Quotient
Fourth graders use number facts to estimate quotients. In this division lesson, 4th graders examine long division problems to determine which multiple of ten will help them determine a number that is close to a quotient. They adjust the...
Curated OER
How Many Ways?
Second graders develop number sense. In this number sense lesson, 2nd graders use multiple ways to represent numbers including written numerals, tally marks and manipulatives. Students correctly use place value to the thousands place.
Curated OER
Add and Subtract Decimals
In this decimal worksheet, learners read about adding and subtracting, then complete a set of 31 problems, adding, subtracting, solving for values of expressions and solving equations.
Curated OER
Ten Sly Piranhas: A Counting Story in Reverse
Young scholars solve related addition and subtraction problems. In this addition and subtraction instructional activity, students use the book Ten Sly Piranhas by William Wise as the source of word problems for young scholars to solve.
Curated OER
My Decimal Number
Third graders brainstorm different ways to represent decimal fractions. They draw on their knowledge of decimal place value, addition and subtraction of decimals, and writing decimals in words and symbols. Students discuss the meaning...
Curated OER
Subtraction: Decimals
In this decimal subtraction learning exercise, students solve 15 problems that require them to subtract decimal numbers with 1-5 digits.
Curated OER
Place Value
First graders practice place value by completing problems that allow them to group 10 items together to create groups of 10 and see what is left over. In this place value lesson plan, 1st graders use cups to put 10 items in them, and...
Curated OER
Word Problems
In these math worksheets, 3rd graders are presented word problems using simple addition. Students complete six word problems with labels for answers on each page.
Curated OER
Mental Arithmetic Sets 3 and 4
For this mental arithmetic worksheet, 3rd graders answer 20 short answer questions related to place value, addition, subtraction, and skip counting.
Curated OER
Decimals Vocabulary Matching
In this decimal vocabulary worksheet, students match a set of 27 words to their correct definitions. Answers are included on page 2; a reference web site is given for additional activities.
Curated OER
Not So Snappy 5
In this order of operations (i.e., addition, subtraction, multiplication, division) worksheet, students solve 5 word problems demonstrating their understanding of the concept.
Curated OER
Clock Arithmetic and Cryptography
Students explore the concept of modular arithmetic and cryptography. In this modular arithmetic and cryptography lesson, students use applets to explore modular arithmetic using a clock and Caesar Ciphers. Students exchange their ciphers...
Curated OER
Not So Snappy 10
In this order of operations (i.e., addition, subtraction, multiplication, division) worksheet, students solve 3 word problems demonstrating their understanding of the concept.
Curated OER
Order of Operations - Add/Subtract
In this order of operations worksheet, students complete addition and subtraction problems with parenthesis and 3 and 4 digit numbers. Students complete 9 problems.
Curated OER
Guess a Birthday
In this birthday worksheet, students perform given algorithms. Upon performing all problems correctly, the student's final answer will be his/her birthday. This one-page worksheet contains 8 problems.
Curated OER
Counting and Calculating
In this math worksheet, students follow the basic activities that are shown in the planning guide written for the teacher. The plan is written in the form of a unit.
Curated OER
Place Value Lessons
Students can learn about place value using interesting lessons, activities, and games.
Curated OER
Hands On Math Lessons with Technology
Students explore a variety of math concepts. In this integrating technology lesson, students visit online webtools such as Max's Math Adventure, I Know That Math, Hands on Banking, and more. A description of each website is provided.
Curated OER
Crossword Puzzle: Decimals Vocabulary
In this crossword puzzle: decimals vocabulary worksheet, 6th graders fill in the puzzle using the clues and math vocabulary words.
Curated OER
Clock Arithmetic and Cryptography
High schoolers investigate modular clock arithmetic and cryptography. They perform basic operations in modular (clock) arithmetic and encode and decode messages using simple shift and affine ciphers.