Learners read about endospores and view video clips demonstrating spore staining procedures. Correctly stained slides are shown.

In this animated object, learners examine how the heating or cooling steps in a manufacturing process work to control a chemical reaction.

Students review the rule for writing the possessive form of singular nouns that end in an "s" sound. They then complete exercises.

Students read about how to make the plural form of nouns that end in "y." They then complete an exercise.

Students read about how to make the plural form of nouns that end with "f" or "fe." They then complete an exercise.

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.

Students review the rule for pluralizing nouns ending in the letter "o." They then complete an exercise.

Learners answer questions about medication from a game board with the headings "Pituitary," "Thyroid," and "Adrenal." Up to three people can play at one time. Contestants "buzz in" their answers to accumulate points.

Learners identify nine glands in a matching exercise.

In this animated object, learners examine the major events that occur at the neuromuscular junction.

In this screencast, learners read about the seven hormones that help regulate blood glucose.

In this screencast, learners examine the properties of the peptide bond and how the bond relates to the structure of hair.

In this animated and interactive object, learners follow two methods for converting a hexadecimal number to a decimal number. They test their knowledge in exercises at the end of the learning object.

Learners answer 20 questions related to discouraging intoxication in an establishment. The questions are presented in a game show format, and immediate feedback is provided. A final score is given at the end of the activity.

By the end of this module, you’ll be able to:

- List four categories of disease agent sources

- Discover conditions when disease transmission is likely to occur

- Describe the means of disease transmission in a given situation

At the end of this lesson you will be able to

- Explain what biosecurity means.

- Describe why biosecurity is important.

- Identify what kinds of disease agents we try to prevent or control with biosecurity.

- Demonstrate disease agent-host-environmental interactions that result in disease.

The student reviews definitions of their/there/they're and completes a practice exercise. The print and email function at the end has been disabled.

By the end of this learning activity, you’ll know how to understand, use, and maintain different types of fire extinguishers.

Learners play a vascular system "game" to identify the arteries, capillaries, and veins that make up the renal blood supply pathway. A score is given at the end of the activity.

In this learning activity you'll review three interpretations regarding the separation of church and state.