In this learning activity you'll locate the countries of Central America on a map.

Learners review the names of the capital cities of the seven Central American countries and locate the cities on a map.

In this learning activity you'll identify abbreviations that represent quantities associated with electrical circuits.

This document gives an overview of lathe lubrication.

In this fourth part in a series, learners follow the steps of the “mathemagician” to examine three numerical curiosities: Be a Psychic by Predicting Birthdays, Predict a Card with Mind Reading, and Predict the Three Die Values Your Opponent Has Rolled. Learners will also study palindromic numbers and look at two alphametric puzzles.

In this interactive object, learners read the definitions of terms associated with the construction of a grouped frequency distribution. A brief quiz completes the activity.

In this animated object, learners examine how the way in which a rheostat is connected in series with other resistors causes current and voltage to change as the resistance is varied.

In this interactive object, learners read how to arrange numerical data manually by using ascending or descending order. They also practice arranging the data using a spreadsheet.

Learners review Ohm's Law and then work 12 problems to help them apply the law to automotive electrical systems. In each of the problems, students are given two of the three variables (voltage, resistance, or current) and are asked to solve for the third.

Students read about the countries that make up the Horn of Africa and locate them on a map.

Students read a definition of Kirchhoff's Voltage Law and view examples of its use.

In this interactive object, learners identify common characteristics of people who are likely to vote.

In part 2 of this series, learners follow the steps of the “mathemagician” to examine these numerical curiosities: The 189 Challenge; An Armstrong Number: What’s Special About 153? Is 495 Different or Indifferent? Is 6174 Different or Indifferent? It is always 618, and Beginning and Ending the Same.

Discover the truth behind commonly held beliefs about the American family.

In this learning activity, we’ll explore the impact of electric shock on the human body.

Learners read the definitions of geological terms and identify the landforms in various images.

Explore the step-by-step procedures to rescue and care for electrical shock victims.

In this learning module, you'll explore what electrical grounding is, how it works, and some real-world applications.

In this learning activity you'll read introduction to electrical quantities, units, and symbols and test their knowledge in a matching exercise.

Students locate the seven countries in the Sahel region, which is between the Sahara and the coastal rain forests. They identify the famous city of Timbuktu in a map exercise.