In this mental arithmetic worksheet, 3rd graders answer 20 short answer questions related to place value, addition, subtraction, and skip counting. 

Students strengthen skills in mathematics, problem solving, and communication skills by working together in groups using "Hot Dog Stand: The Works" educational software.

Twelfth graders differentiate between inductive and deductive proofs.  In this differentiating between inductive and deductive proofs lesson, 12th graders compare strengths and weaknesses of each type of proof.  Students...

Students read, write, and identify different coin combinations and use this information in real-world situations.

In this magic shapes instructional activity, 7th graders work in groups to solve 9 magic square puzzles requiring logic and problem solving.

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 investigate light and its energy. They discuss the properties of light, research how much light the moon absorbed on their birthday on a website, complete a graphic organizer, and create a kaleidoscope.

Students practice story telling. In this story telling lesson, students work in groups to read a fable and divide it into a beginning, middle, and end. Each member takes a section and practices retelling it with vocals, gestures, and...

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.

Students listen to the teacher read a book entitled, Hoot by Carl Hiaasen. In groups, students create KWL charts concerning the book, the author, and the author's writing style. In groups, students research topics about the book and its...

In this math worksheet, students subtract the decimals while taking special care to keep the decimals in the correct place value. The answers are also available.

In this exercise, students practice breaking apart two-digit addition problems. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

In this exercise, students practice adding two-digit numbers (no regrouping). Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

Practice adding two-digit numbers by making tens on Khan Academy. If you are stuck, watch a refresher video or choose to get a hint. Test yourself to see how many you can get correct!

In this exercise, students practice subtracting two-digit numbers (no regrouping). Students receive immediate feedback and have the opportunity to watch a tutorial video, get hints, and try questions repeatedly.

In this activity, students learn to build and add two digit numbers. They connect number words and numerals.

Explains how to add two-digit numbers by focusing on each column of digits as you add, rather than the entire numbers.

Practice adding two-digit numbers by making groups of ten.

This lesson has an explanation for adding two-digit numbers using paper and pencil. There is also a game to practice your skills. The game gives you a percent score of your correct answers, as well as running totals of your correct and...

[Free Registration/Login may be required to access all resource tools.] The video shows how to add three, two-digit numbers. The video is followed by practice problems covering the topics in the video.

Learn how to add double-digit numbers in this lesson complete with examples, rules, and vocabulary.

In this instructional activity on addition within 100, students will learn how to compose numbers and will explore strategies to add double-digit numbers such as vertical addition, regrouping, using multiples of 10, and labeling an open...

[Free Registration/Login may be required to access all resource tools.] The video shows how to add 3, two-digit numbers followed by additional practice problems.

These interactive flashcards help students add two-digit numbers through 99. The problem changes color with the correct answer.