In this learning activity you'll examine how electronic converters convert between analog voltages and proportional digital signals.

This module will guide you thru the use of welding coupons in the welding process.

Learners follow steps to add fractions with different denominators. They also review fraction concepts, do a drag-and-drop exercise involving fraction terms, and add fractions with common denominators.

In this interactive object, learners examine the structural-functional, social-conflict, and symbolic interaction analyses of recreation. A mind map and quiz questions are included.

Learners play a game to review concepts connected with student assessment. The categories on the game board are "General Assessment," "Science Assessment," "Math Assessment," and "Famous Scientists."

In this animated object, learners examine an analog closed-loop feedback system that uses potentiometers to control the position of a gear rack.

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

In this animated activity, students view a step-by-step approach of how to connect an ammeter to a circuit. A brief quiz concludes the lesson.

In this interactive and animated object, learners examine the SUN VAT-40 battery starting and charging system tester. This learning object demonstrates the use of the tester in diagnosing conventional 12-volt automotive charging systems. It contains audio.

The Animal Welfare Act, or AWA, gives protection to animals used in research, education, and entertainment. Explore ethical use and some of the current alternatives in this module.

In this learning activity you'll test your knowledge of angular measurement in this 10-question quiz.

In this highly interactive and animated object, learners complete three exercises to identify the cranial nerves and their functions.

In this interactive object, learners examine the structural-functional, social-conflict, and symbolic interaction analyses of science and technology. A mind map and quiz questions are included.

Learners review the differences within the right and left parietal lobes. They answer questions based on a case study and describe a client in a second case study.

Learners examine and identify the parts of the hip joint.

In this accounting learning object, students follow the steps involved in the closing process. Temporary accounts contain ending balances for a specified period and must be closed.

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.

The learner will identify components of a welding robot and determine if the robot is set up correctly to avoid singularity.

In this learning activity you'll explore public key encryption and conclude with a short quiz.

In this learning activity, learners will learn to calculate the average voltage produced by half-wave and full-wave rectifiers.