## Common Core State Standards for Mathematics

Grade(s) K-12 resources related to the following standard:
Standards for Mathematical Practice
Look for and make use of structure.

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This interactive Sudoku puzzle develops logical thinking and perseverance. With this puzzle a player must place the Christmas items in the cells such that each picture appears only once in each row, once in each column, and once in each 3x3 grid.
Interactive Media
In this blog entry Michelle Flaming describes what the implementation of MP 7 looks like in the classroom. She lists student actions, teacher actions, and open-ended questions that teachers can ask to help students find and make use of structure in the ways required by MP 7.
Reference Materials, Community
Grade Level: K, 1, 2, 3, 4, 5
Resource is part of a PD collection
This brief article relates the legend of young Gauss and the summing of consecutive numbers. Readers are asked to apply the method and they are shown a general solution. A link to a printable page is provided as well as links to related topics.
Reference Materials, Article
Grade Level: 3, 4, 5, 6+
This activity and Java applet allows a student to explore modular arithmetic. It is also a tool for finding remainders where all the possible numbers (the numbers less than the divisor) are put in a circle or clock. The learner uses the scroll bar to modify the size of the clock from 2 to 26 hours, sets a starting value and then moves the "clock" forward a number of specified hours to see the resulting sum. Support pages for the learner and the instructor are included.
Activity, Interactive Media
In this 4-minute video, educators can watch a teacher deliver a fourth grade lesson on using number sense, arrays, and simpler calculations to solve a more complex problem, called a cluster problem. Watch this teacher check for understanding of multiplicative distribution and the use of arrays.
Lesson Plans, Video
Resource is part of a PD collection
In this five page NCTM article, the author details the experience of a kindergarten class collecting data on a nature walk. The author describes the process of determining how the class would collect data and what kind of data they would collect. In this particular activity the class was collecting measurement data.
Reference Materials, Article
This interactive Java applet helps students analyze and extend patterns. The applet displays a pattern of beads and the user selects colors in the correct sequence to continue the pattern. The applet acknowledges each correct solution and encourages the user to fix any incorrect ones.
Activity, Interactive Media