Students 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.

In this math worksheet, students break down one digit numbers by thinking of numbers which can be added together to get that sum. Students then relate simple subtraction facts in the same family. There are 15 problems.

In this math worksheet, students engage in a mental math activity. Student think a number and follow several computations with that number and always come up with the answer 9. Students discuss why this happens.

In this subtraction worksheet, 1st graders solve for the differences in 30 vertical problems in which they use numbers up to 12.

In this order of operations (i.e., addition, subtraction, multiplication, division) instructional activity, students solve 5 word problems demonstrating their understanding of the concept.

Students demonstrate regrouping in subtraction. In this math computation lesson, students use popsicle sticks to practice the regrouping strategy. Students practice several examples of regrouping problems in small groups.

Students use estimation and pencil-paper calculations to help Jack and his mother solve a variety of life problems. They solve problems using various math operations, i.e., addition, subtraction, and measurement.

In this subtraction worksheet, students subtract 20 single-digit math problems as fast as they can in 2 speed races. Students write their answers on the worksheet provided.

In this subtraction worksheet, students complete a set of 20 single digit addition problems. An answer key is included on page 2.

Fourth graders complete multiplication, addition, and subtraction problems that all contain regrouping. In this regrouping lesson plan, 4th graders complete worksheets not provided.

Students complete activities to study the concept of place value notation. In this place value lesson, students use cards for the days of the month that only number from 1 to 9. Students find a subtraction pattern to determine the amount...

Any first grader can master the Common Core math standards with this checklist! With each standard rewritten as an affirmative I can statement, children are provide with clear goals to work toward throughout the school...

Second graders practice vocabulary related to measurement, mathematics, and dinosaurs. Using the engaging topic of dinosaurs, learners will calculate various information about dinosaurs and use measurement vocabulary. They will also...

Young learners will view a math adventures video and practice math concepts.  Afterwards they will navigate through Internet sites to participate in teacher selected math adventures. This guide walks you through integrating...

In this math worksheet, students solve 11 math card clues. All of the clues involve addition or subtraction. For example, one card reads, "I am zero. Add on 4."

Students practice basic addition and subtration facts to twelve and use thinking skills to win at tick tack toe.

This lesson plan engages learners in a variety of activities to build 1 to 1 correspondence, estimation, and problem solving skills. They discuss problem solving strategies, hear the story Ten Flashing Fireflies, compose their own...

Upper graders add and subtract decimals, using concrete objects and story problems. Note: The Concentration Cards and Homework assignment link at the bottom of the plan doesn't work.

In this math skills worksheet, 1st graders enhance their addition and subtraction skills by solving the 20 pages of double digit equations.

In this fact family worksheet, 1st graders use the domino pictured to write problems. Students create 2 addition and 2 subtraction problems for each of the 4 dominoes represented. Students then solve for 8 single digit problems at the...

Second graders watch as volunteers divide large paper M&Ms on the board. They divide M&Ms into groups and write division sentences to show understanding of division concept. They eat M&Ms.

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...

Students practice with a variety of simple equations involving addition, subtraction, multiplication and division. Explanation is followed by each block of equations given to solve. They are set loose to complete additional equations for...

Pupils count back with cubes to model subtraction problems. In this subtraction lesson plan, students compare sets of problems and record their results in a table.