Observe various severe weather phenomena in this image gallery from WGBH. Weather is the combination of factors -- temperature, wind, snow or rain, and sunlight and clouds -- that happen in a specific place at a specific time. Sometimes...

Explore how weather can change during snowstorms in this slideshow produced by WGBH. The images show the progression of snowstorms from a light flurry to a steady snow to a blizzard to conditions after a storm ends. Students can use the...

A very good comparative study of the sheep brain to our brain. Looking for "Memory", or more precisely the location of memory in the brain.

This lesson introduces the passive voice and how it is formed. This tutorial lesson shares a short slideshow with the lesson's content.

Nice animation of how to create a Winogradsky column using bacteria from pond mud. Learn how "mud can be mixed with several ingredients to provide food and other substrates for the bacteria to use" to survive.

Learning to "read" the images that surround us is an important 21st century skill. This series of slides, presented in .pdf format, provides lots of examples, exercises and resources.

A five-slide presentation reviewing passive voice and explaining the effect of using it properly within a sentence. Examples are provided.

A video lesson introduces the passive voice and demonstrates how it is formed within a sentence. [7:09]

A slide show with sixteen slides with definitions, examples, and practice activities to use while learning about the difference between fact and opinion.

Click through this PDF slide presentation to learn a definition of tone and to gain a better understanding of how it is used in literature. Slides include activities to help students see the effect of using different tones and examples...

A PowerPoint presentation that explains chirality and chiral molecules.

This is a slide show type alphabet "Book," that begins with a photograph, but then depends heavily on clip art. Fine for an alternative type alphabet practice, but instruction would be necessary to show how to move from slide to slide.

This lesson will introduce the process of fermentation and explain how it allows cells to produce energy in the absence of oxygen. It is 1 of 2 in the series titled "Fermentation."

This lesson will show that each enzyme fits to a specific structure using the lock and key model. It is 4 of 4 in the series titled "Lock and Key Model."

This lesson will give a general overview of cellular respiration and describe why it is important. It is 1 of 4 in the series titled "Cellular Respiration Introduction."

Explore these photos taken by a volcanologist as he traveled to the crater of Mount St. Helens.

A broad selection of images featuring Cesar Chavez can be found on this site by Calisphere. By clicking on individual images you'll find high quality photographs and image information.

This lesson introduces the processes of endocytosis and exocytosis, both processes which move larger molecules in and out of the cell, by way of vacuoles. It is 3 of 4 in the series titled "Endocytosis and Exocytosis."

This lesson introduces the processes of endocytosis and exocytosis, both processes which move larger molecules in and out of the cell, by way of vacuoles. It is 4 of 4 in the series titled "Endocytosis and Exocytosis."

This slideshow lesson discusses how to use variation in sentence structure to produce more effective writing.

This lesson explains the reading strategy of reflecting on reading. This tutorial lesson shares a short slideshow with the lesson's content.

An online slide show defines pronouns and explains their use at this site. A link at the end leads to an interactive quiz which provides immediate feedback and explanations for each answer.

An interactive slide show about the Boston Tea Party with links to museums and sites related to the Boston Tea Party.

Travel into the Underworld, a place, according to Egyptian belief, that one must pass through to get to paradise. See if you can make it safely.