## 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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In this four-day lesson students use several models to explore equivalent fractions and to compare proper fractions with denominators of values up to 12. It incorporates the book "The Hershey's Milk Chocolate Bar Fractions Book" by Jerry Pallotta. The 30-page pdf includes lists of materials, teacher instructions, printable activity sheets, assessments, and a game.
Activity, Lesson Plans
This series of activities can be used to introduce number sequences and patterns and to reinforce parity (even and odd numbers) and its application in addition. The resources are intended for use on an interactive whiteboard but may also be used individually or in small groups. They can be accessed online or downloaded (zip) to a local computer. The pack includes teacher notes, background information on the content, and a student worksheet.
Activity, Interactive Media, Lesson Plans
This lesson and interactive applet lets students explore geometric relationships and make and test conjectures. The main task centers on identifying what distinguishes a rectangle from a more general parallelogram. Students manipulate both figures and look for comparisons. Suggestions for implementation and supplemental tasks are provided.
Interactive Media, Lesson Plans
This is the last of a three-part E-Example from Principles and Standards for School Mathematics of the NCTM algebra standards that highlights different aspects of students' understanding and use of patterns as they analyze relationships and make predictions. An applet demonstrates ways in which students can begin to create a "unit of units," or a grouping that can be repeated, and help students begin to relate two patterns in a functional relationship. Background information for the teacher is provided.
Demonstration, Video
This article proposes a structured set of lively, brief, daily exercises designed to help children master number facts and mental math skills. Each day's practice focuses on a small, highly focused, manageable, and strategically selected set of facts or skills that builds directly on the previous days' learning. Related resources (Practice and videos) are cataloged separately.
Activity, Instructional Strategy, Reference Materials, Article
Grade Level: 1, 2, 3, 4, 5
Resource is part of a PD collection
This interactive online game helps students develop fluency with identifying factors while fostering strategic thinking. A student can play against the computer or against a friend on a 6 by 6 grid containing the numbers 1-36. Each player in turn chooses a number from the board, and then the opponent claims all of its remaining proper factors. A player's score is the sum of all the numbers and factors she/he has chosen. When there are no numbers remaining with unclaimed factors, the game ends and the player with the greater total is the winner. This game is part of NCTM's Calculation Nation project (cataloged separately). Users may login as a guest and play against the computer, or register (free) to challenge other players online.
Activity, Game, Interactive Media
Grade Level: 3, 4, 5, 6+
This lesson uses the context of a two-person game to develop the concepts of prime and composite numbers as well as strategic thinking. The game may be played on paper or with an online applet (cataloged separately). Students analyze the results of first moves to arrive at an effective game strategy. The included student worksheet (pdf) extends the range of numbers played and introduces students to abundant, deficient, and perfect numbers.
Activity, Game, Interactive Media, Lesson Plans
Grade Level: 3, 4, 5, 6+