Discover what smoking does to one's body with a detailed reference page that points out the types of cancers and chronic diseases that can occur when using tobacco products. 

Much has been written recently about the danger of secondhand smoke. Laws have been passed to limit that exposure in offices, transportation centers, and public areas. But what about apartment buildings, condos, public housing, and other...

Here is an outline map of Washington, DC. Some of the points of interest in the city are labeled, as are Maryland, Virginia and Arlington. There are plenty of important monuments and locations not identified, making for a good...

There are a number of social, emotional, and physiological reasons why teenagers start smoking, and why they continue smoking into adulthood. Help class members understand why smoking begins in youth—and how to protect themselves from...

This slideshow lesson focuses on types of questions; it provides background, purpose, and a list of the seven types of questions: rhetorical, direct or interrogative, indirect, open-ended, closed, and embedded. It provides background and...

This lesson focuses on the six main types of reading comprehension questions: main idea, purpose, tone, inference, detail, and definition. It explains each type and offers examples in text and in audio formats.

This site takes a look at a wide range of government types. Investigates democracies, communist states, authoritarian regimes, absolute monarchies, and more. Detailed, time-stamped charts and maps are also included.

Provides photographs of nine different types of glaciers with information about where they are located.

This slideshow lesson focuses on types of conflict including the 3 main types: internal, external, and relational. It defines internal conflict, gives ways the character could be conflicted, and provides literary examples. It lists the 4...

Six printable fact sheets on how to understand and recognize different types of text including descriptive, informative, instructive, and persuasive.

In this slideshow tutorial, students will review the different types of reading comprehension questions. Examples of different question stems are provided.

Diagram shows the different types of clouds that are located in the sky. Click on each clouds name for images and further information.

Review an exhaustive photographic collection of clouds. Classify each image and select favorites among the grouping. A key illustrating each type of cloud is provided for reference.

This infographic takes a look at science in general, specifically focusing on the hierarchy of different types of scientific evidence.

Data Crunches feature one chart or graph followed by five scaffolded questions to guide students through analyzing the data and drawing conclusions. These sets of data help students understand credit concepts.

This site includes a listing of United States frequencies of the various human blood groups.

This lesson will introduce flow chart proofs, paragraph proofs, and two-column proofs, and explain the similarity and differences between the different types of proofs. It is 3 of 5 in the series titled "Types of Proofs."

This lesson will introduce the three types of RNA and describe how they are used within a cell. It is 2 of 4 in the series titled "Types of RNA."

This lesson introduces types of conflict that appear in fiction writing.

A chart with explanations and examples of six different types of context clues including: definition, appositive, synonym, antonym, example, and general.

A brief overview presenting the three types of RNA responsible for protein synthesis in the cell.

A graphic compares different types of dunes in terms of the presence of three parameters: wind, sand, and vegetation. Clicking an example reveals a photo and a sentence about the dune formation.

The various changes to the larynx are explained and diagrammatically show for several phonatory settings such as a whisper and affected and unaffected speech.

This slideshow gives a detailed explanation of the characteristics of statistical questions and how they differ from other types of questions, the types of studies, and the methods for collecting data. It describes the case of Clever...