Resources and Tools for Elementary Math Specialists and Teachers

Common Core State Standards for Mathematics

Grade(s) K-12 resources related to the following standard:
Standards for Mathematical Practice
Look for and express regularity in repeated reasoning.

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This interactive Flash applet helps students develop number sense and basic number concepts. Players attempt to guess the wizard's number by clicking on dragons to get clues related to the digit sum, a more/less range comparison, rounding, how far it is to the next hundred, comparison of tens and units, the number of units, and parity. Clicking on the wizard opens a keypad on which to type the secret number. A version covering numbers 0-100 is cataloged separately.
Activity, Interactive Media
Grade Level: 2, 3, 4, 5
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In this 6-minute video Doug Williams uses the problem Eric the Sheep to demonstrate the work habits of a mathematician. Dr. Williams thinks aloud as he models the problem with manipulatives while collecting and organizing data. Eric the Sheep has moved from the url provided in the video; look for task 45 in the Task Library at mathematicscentre.com.
Lecture/Presentation, Video
Grade Level: 1, 2, 3, 4, 5
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This problem provides an opportunity to introduce a visual way of representing operations on unknown numbers to help lead students to using a symbolic representation. Learners are asked to think of a number and then through an interactivity are given a sequence of operational instructions to follow which leads all students to the same final number. The Teachers' Notes page offers suggestions for implementation, key discussion questions, ideas for extension and support.
Activity, Interactive Media
Grade Level: 5
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This problem provides an opportunity to introduce the concept of representing operations on unknown numbers algebraically and leads to work on inverse operations. Students are asked to think of a number, follow a sequence of computational instructions and finally to enter the result into the "machine." Students explore how the "machine" works out the starting number. The Teachers' Notes page offers rationale, suggestions for implementation, discussion questions, ideas for extension and support.
Activity, Interactive Media
Grade Level: 5, 6+
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Brian Marks and Leslie Lewis maintain this blog dedicated to providing upper elementary and middle school teachers with rich, real-world problems intended to engage students in reasoning, critical thinking, questioning, and communication. The problems address the NCTM Process Standards and are aligned with the Common Core Standards and Mathematical Practices. Problems can be browsed by category or from a "bird's eye" listing. Activities (pdf) are free; paid members ($15/year) gain access to solutions, teaching tips, and other teacher support materials.
Activity, Instructional Strategy, Community
Grade Level: 4, 5, 6+
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