Learners review the VDR and work six problems. Immediate feedback is given.

In this animated object, learners are introduced to the structure and function of animal cell organelles.

In this learning activity you'll evaluate the immune response including active, passive, natural, and artificial immunity.

Explore what proteins are, their structure, and their functions.

Learners examine the structure and function of skin including the production of melanin.

Learners examine the function of each part of a microscope and follow step-by-step instructions on how to focus on a specimen. They also review the proper use and care of a microscope and test their knowledge in two drag-and-drop exercises.

In this animated object, learners view molecules as they collide and move between two different solutions. They also observe what happens when the temperature of the solutions is raised or lowered.

In this learning activity you'll create a packet filter.

Learners examine microscope images of blood agar and the various types of hemolysis that can be detected. A quiz completes the activity.

Learners follow step-by-step instructions for creating a current-state map to identify how materials and information flow.

In this colorful and interactive object, learners examine the structure and function of muscle and connective tissues. A quiz completes the activity.

In this learning activity you'll examine the software operation Dynamic Host Configuration Protocol (DHCP), which automatically performs TCP/IP configurations.

Learners use this Structured Query Language tutorial to gain an understanding of how a SELECT statement is built. This learning object has audio content.

In this interactive learning object, students read about the voltage and current parameters commonly found on a data sheet. A brief quiz completes the activity.

Viewers watch an introduction to monosaccharides, disaccharides, and polysaccharides. The processes for dehydration synthesis and hydrolysis.

Students read about the process of hair growth beginning with the joining together of amino acids.

In this learning activity you'll recognize several patterns on an Xbar and R control chart. These non-random patterns are indications that the process is not in a state of statistical control.

Learners examine the accounting equation and classify accounts into the appropriate categories in drag-and-drop exercises.

Learners identify various therapeutic interaction strategies to be used when working with children and adolescents to enhance self-esteem, self-concept, self-worth, body image, and coping and communication skills.

Learners examine the operation of a proportional control amplifier and the two ways that it is programmed using proportional gain or proportional band. A brief quiz completes the activity.

In this learning activity you'll explore bandwidth.

Learners review Ohm's Law and then work 12 problems. 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.

The learner will understand the two methods used to create a phase shift in current between two windings.

In this animated and interactive object, learners examine ABO blood antigens and Rh antigens and their compatibility.

Learners read how they can make menus more pleasing to the senses by paying attention to shape, form, texture, temperature, color, flavor, and visual appeal.