### Electric Circuits

A Concept-Builder is an interactive questioning module that presents learners with carefully crafted questions that target various aspects of a concept. Each Concept Builder focuses the learner's attention upon a discrete learning outcome. Questions target that outcome from a variety of angles using multiple difficulty levels or varying activities. Learners ponder the given information and answer questions in the hopes of earning Stars and Medals. These Stars (for answering questions) and Medals (for completing levels or activities) are displayed on the screen, allowing a teacher to track student progress. The following Concept Builders target concepts in Electric Circuits.

Light Bulb Anatomy Learning Goal: To identify the pathway that charge takes through a light bulb and to use that information to make specific bulbs in a circuit light.

Current Learning Goal: To identify the direction of the current, to compare its value at various locations in a circuit, and to predict the effect of varying number of cells and bulbs upon the current.

Resistance Ranking Tasks Learning Goal: To rank the relative resistance of various wires based on information about the wire length and cross-sectional area.

Know Your Potential Learning Goal: To understand the concept of electric potential and to use the concept to predict which bulbs light in a complex circuit and to identify the electric potential value at various locations in a circuit.

I = ∆V/R Equations as a Guide to Thinking Learning Goal: To use voltage-current-resistance relationship to predict the effect of varying voltage and varying resistance upon the current in a circuit.

Which One Doesn't Belong? - Equivalent Resistance Learning Goal: To analyze series and parallel circuits to determine their equivalent resistance and to compare its value to that of other circuits.

Series Circuits - ∆V = I•R Calculations Learning Goal: To use the ∆V = I•R equation to analyze a simple or a series circuit and mathematically relate a battery voltage, a current value, a resistance value, or a potential value.

Parallel Circuits - ∆V = I•R Calculations Learning Goal: To use the ∆V = I•R equation to analyze a parallel circuit and determine voltage and current values at specific locations.