This activity presents the user with a simulated circuit consisting of four resistors in series with a DC voltage source. Three of the resistors are accessible to, and can be…
This activity uses a model of the Virtual Ecosystem with three species in it: grass, rabbits, and hawks, enabling the students to explore the effect of predation on the prey…
This activity introduces students to the idea that all living organisms must compete for food. Students control a rabbit in a field with edible plants, at first alone, and later…
The goal of this activity is to introduce students to the variation that exists in a population of organisms. Students plant different seeds in a field with a gradient of…
The goal of this activity is to introduce students to how variation in organisms can enable them to live in different environments. For example, plants with different sizes of leaves…
This activity helps students understand translations of functions, where a translation is a movement of the function left, right, up or down. The function retains its basic shape; however, by…
This activity helps students understand dilations of functions, where a dilation is a vertical or horizontal stretch or compression. When a function is multiplied by a number, the shape of…
A reflection is a transformation of the graph of a function over the x-axis or the y-axis (or both). The function retains its basic shape; however, by including a negative…
This activity helps students understand all transformations of functions: translations, dilations and reflections. The function retains its basic shape when it is transformed; however, by making small changes to the…
Transistors are the building blocks of modern electronic devices. Your cell phones, iPods, and computers all depend on them to operate. Thanks to today’s microfabrication technology, transistors can be made…