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Practice estimation skills by determining the number of objects, the length of a line, or the area of a shape. Parameters: error tolerance of estimate. Estimator is one of the Interactivate assessment explorers.

Triple Venn Diagram Shape Sorter (Activity)

Sort colored shapes into a three circle Venn Diagram.

Estimator Exploration Questions

This worksheet is for use with the Estimator activity (http://www.shodor.org/interactivate/activities/Estimator/).

Cantor's Comb (Activity)

Learn about fractions between 0 and 1 by repeatedly deleting portions of a line segment, and also learn about properties of fractal objects. Parameter: fraction of the segment to be deleted each time.

Properties of Fractals (Lesson)

A capstone lesson to allow students to build a working definition of fractal.

Modular Arithmetic (Lesson)

Introduces students to modular (clock) arithmetic and its uses in real world problem-solving.

Hilbert Curve Exploration Questions (doc)

This worksheet is for use with the Hilbert Curve Generator activity (http://www.shodor.org/interactivate/activities/HilbertCurve/).

Introduction to Fractals: Infinity, Self-Similarity and Recursion (Lesson)

Introduces students to the ideas involved in understanding fractals.

Prisoners and Escapees--Julia Sets (Discussion)

Defines the notion of prisoners and escapees as they pertain to iterative functions. A prisoner ultimately changes to a constant while escapees iterate to infinity.

Inverse Properties (Discussion)

Introduces the concepts of the additive inverse and multiplicative inverse and how they are used when solving equations.

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