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1-24 of 167 results for Materials Submitted by Barbra Bied Sperling

Test the pH of things like coffee, spit, and soap to determine whether each is acidic, basic, or neutral. Visualize the... see more

Practice your knowledge of acute, obtuse, and alternate angles. Also, practice relationships between angles - vertical,... see more

Create your own affine cipher for encoding and decoding messages. Input your own constant and multiplier, then input a... see more

Using toothpicks, straws, or tubes of rolled up newspaper, learners create 3-dimensional models to illustrate the basic... see more

Manipulate different types of conic section equations on a coordinate plane using slider bars. Learn how each constant... see more

Explore cross sections of different geometric solids: cone, double cone, cylinder, pyramid, and prism. Manipulate the... see more

Visually represent two unique fractions that are equivalent to a given fraction. The fractional value is shown on a... see more

Learn about estimation through modeling of a forest fire. This activity allows the user to burn a virtual forest, then... see more

Determine the value of two given fractions represented as points on a number line. Then find a fraction whose value is... see more

Students investigate linear functions by trying to guess the slope and intercept from inputs and outputs. Linear Function... see more

Students create linear inequalities and systems of linear inequalities on a coordinate plane. This is like a graphing... see more

Investigate the Cartesian coordinate system by directing a robot through a mine field laid out on the plane. Maze Game is... see more

Recognize patterns in a series of shapes, numbers, or letters. After determining the pattern, the student fills in the... see more

This applet tests the simulated annealing algorithm to solve the travelling salesman's problem. The user finds a route... see more

Build your own polygon and transform it in the Cartesian coordinate system. Experiment with reflections across any line,... see more

Enter a complex value for "c" in the form of an ordered pair of real numbers. The applet draws the fractal Julia set for... see more

In this technology activity, learners explore digital imaging and pixels. Learners "transmit" an image to a partner by... see more

In this computer science activity about finite-state automaton (on page 45 of the PDF), learners use a map and choose... see more

Peter Mueller at the Globewide Network Academy created these lectures to be used in an online introductory course to... see more

In this activity related to computer programming, learners give directions to a "robot" (either an adult or another... see more

This computer interactive lets you explore the effect of changing the number of colors and resolution of a picture. You... see more

In this activity, learners use a fictitious map of "Tourist Town" and counters to problem solve how to place ice-cream... see more

Test your algebra skills by answering questions. This quiz asks you to solve algebraic linear and quadratic equations of... see more

3D FractaL-Tree allows scientists to collect data from actual specimens in the field or laboratory, insert these... see more