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Introduces students to a geometric derivation of the conic sections.
Slope Slider (Activity)
Similar to other "flyers", Slope Slider uses slider bars to explore the effect of the multiplier and constant on a linear function of the form f(x)=mx+b. Explore the relationship between slope and intercept in the Cartesian coordinate system.
Introduces students to lines, rays, line segments, and planes.
This worksheet is for use with the Graph Sketcher activity (http://www.shodor.org/interactivate/activities/GraphSketcher/).
Inequalities (Discussion)
Introduces students to linear inequalities.
Caesar Cipher III (Activity)
Decode encrypted messages to determine the form for an affine cipher, and practice your reasoning and arithmetic skills. Input your guesses for the multiplier and constant. Caesar Cipher III is one of the Interactivate assessment explorers.
Introduces the notion of using modular arithmetic to encode messages.
This worksheet is for use with the activity Equation Solver (http://www.shodor.org/interactivate/activities/EquationSolver/).
Introduction to various algorithms for solving single-variable, linear equations.
Vertical Line Test (Activity)
Learn about the vertical line test for functions by trying to connect points in the plane to build a function. When you have connected all of the points, you will be told if your graph is a valid graph of a function. Vertical Line Test is one of the Interactivate assessment explorers.

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