Standards for Mathematical Practice

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Resource | Resource Type Grade Level | Rating |
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In this interactive application students playing at the easiest level count the number of each type of animal at the zoo on an island and choose the correct number to complete the list. The middle level has the student clicking on the number of each animal as shown in the bar graph. The hardest level requires students to interpret the data displayed in the bar graph. A worksheet is included in PDF format to be used for student work. | Activity, Interactive Media Grade Level: K, 1, 2 | |

This interactive Java applet illustrates the approximation of the area measure of a unit circle using inscribed regular polygons. Users can choose the number of sides (3-1000), or have them increased by one at a time. The applet reports the polygonal area to 15 decimal places. | Interactive Media Grade Level: 4, 5, 6+ | |

This web site contains information and interactive applets related to our Hindu-Arabic number system. Users learn the history and structure of the system as well as how to count and write numbers. Users can learn and practice various algorithms for whole number computation and explore fractions, decimals and percents in our number system. The site explains various sets of numbers and how they relate to operations. | Activity, Interactive Media, Tutorial, Reference Materials Grade Level: 1, 2, 3, 4, 5 | |

This interactive Wolfram Demonstration helps students visualize the relationship between multiplication and the area of a rectangle. On a 10x10 multiplication table, with 1 in the lower left and 100 in the upper right, users adjust the size of a rectangle by dragging a vertex or sliders, or by choosing a product from a pulldown list. The resulting rectangle highlights the width, height and area (factors and product) as well as other equivalent areas (products) on the board, illustrating commutativity and multiple factor pairs. Wolfram CDF Player, a free download, is required to view this resource. | Activity, Interactive Media Grade Level: 3, 4, 5 Resource is part of a PD collection | |

This interactive Flash applet offers three ways for students to practice basic fact skills related to multiplication and division. Users control the challenge level by choosing the size of the blank multiplication grid displayed by the applet. In Multiply mode users type in the product that completes a multiplication sentence. In Factor mode users click a grid cell that matches a given product. In Divide mode users type in a missing factor in the displayed multiplication sentence. A sound effect and timing feature are optional. | Activity, Interactive Media Grade Level: 3, 4, 5 | |

This interactive Flash applet helps students develop the concept of equal groups as a foundation for multiplication and division. The applet displays an array of dots, some of which are covered by a card. Student use the visible number of rows and columns to determine the total number of dots. Clicking on the card reveals the full array, and a voice announces the total. | Activity, Interactive Media Grade Level: 2, 3, 4 Resource is part of a PD collection | |

This question and answer service for math students and their teachers offers a searchable archive all about place value at the elementary level. Topics addressed include rounding, estimating, significant digits, and scientific notation. | Community Grade Level: 3, 4, 5, 6+ | |

This interactive Java applet gives students practice in sorting attribute blocks by color, shape, or size. In each problem students are presented with a set of objects that share a common attribute, and they must identify objects from another set that have the same attribute. Students can check their solution, and have another try or request a new problem. Teacher information about the blocks and their classroom implementation is included. | Activity, Interactive Media Grade Level: 1, 2, 3 | |

This interactive Java applet helps students learn about sequences and patterns through analysis of attributes. The user analyzes the existing pattern and must complete the "train" by dragging the appropriate shapes into place. The user is required to discern which attribute is used to create the pattern (color, shape, or number) as well as determine how to extend it. | Activity, Interactive Media Grade Level: 2, 3, 4 | |

This problem, from the collection of Aunty Mathilda challenges, promotes algebraic thinking and problem solving strategies. When Mathilda was ten years old her rich aunties wanted to give her a gift of money for her birthday but she must first decide if she would rather have one more silver dollar then she received last year on her birthday or twice as many dimes then she received last year. Aunty Mathilda's nephew believes she made the wrong decision. Included are links to an easier challenge and to a harder one, and additional background support: alignment to the CCSS standards, explanations, literature connections and extensions regarding the challenge. | Activity Grade Level: 2, 3, 4, 5 |