In this learning activity you'll review the format for a five-paragraph essay, which is the second part of the GED Writing Test.

In this learning activity you'll discover transitional words to help you write an effective GED/HSED essay.

Learners examine the properties that determine capacitance.

In this animated object, learners examine cycles, frequency, Hertz, wavelengths, and periods. A brief quiz completes the activity.

In this animated lesson, learners examine sine waves and alternating current. A brief quiz completes the object.

Learners explore the use of complex numbers through a series AC circuit analysis problem. The steps are compared to the graphical method of finding circuit impedance and the phase angle.

In this interactive object, learners review descriptions of various blood collection tube additives. They then test their knowledge by matching the different tubes to their corresponding additives.

In this learning activity you'll discover how visual perception is influenced by what's surrounding an image.

In this interactive object, part 3 in a series, learners follow the steps of the “mathemagician” to examine four numerical curiosities: What’s Special About 1089, Perfect Squares: 1089 and 9801, The Mathematical Significance of 1776, and The Calculator Number Game. The learner will also study six number patterns and look at one remarkable table. Immediate feedback is provided.

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.

Learners view an explanation of how to read a graduated cylinder by measuring the lowest portion of the meniscus. A quiz completes the activity.

In this learning activity you'll discover how visual perception of size is influenced by what's surrounding an image.

In this learning activity you'll discover how visual perception of size is influenced by what's surrounding an image.

Learners observe current flow throughout the series portion and branches of a parallel circuit. This animated activity includes calculations and a short quiz.

In this learning activity you'll discover how visual perception is influenced by what's surrounding the image.

In this learning activity you'll discover how visual perception of size is influenced by what's surrounding an image.

In this learning activity you'll discover how perception of size is influenced by what's surrounding an image.