In this animated lesson, learners read about the disulfide bond, the second strongest chemical bond in the hair. This bond can only be altered by chemicals.

Students read how to calculate feed rates for drills in inches per minute (IPM). The IPM formula is given and students work two practice problems.

In this learning activity you'll create presentation note cards to use during your speech.

In this screencast, learners examine the steps of carbohydrate digestion.

Learners examine the properties that determine capacitance.

The student reviews definitions of past/passed and completes a practice exercise.

The student reviews definitions of all ready/already and completes a practice exercise.

In this learning activity you'll practice calculating a combined variation problem.

Learners view the scene of a suspicious death and select the evidence that needs to be collected.

Students read an explanation of chemical formulas in this animated activity. A quiz completes the object.

In this learning activity you'll examine the RG ratings, networking applications, and types of connections for various coaxial cables.

This video illustrates what can happen in a court room when chain-of-custody procedures for collecting evidence are either ignored or not carried out properly.

In this learning activity you'll analyze the basic steps in conjugation and applies the effect to microbial characteristics.

The purpose of the conveyor and how it accomplishes its objective.

In this learning activity you'll solve systems of two linear equations in two unknowns by determinants.

The student reviews definitions of then/than and completes a practice exercise.

In this animated object, learners examine the factors that determine how well a capacitive proximity sensor can detect an object. Those factors include size, position, and the materials from which the target is made. A brief quiz completes the activity.

Compare the behaviors and situations that interfere with effective communication in the workplace with those that enhance listening skills and career performance.

In this learning activity you'll explore different reasons to write a memo and how to create it.

In this study guide, we will review the general rules for using prepositions.