Students debate the validity of predictions about the greenhouse effect.

In this matching questions to answers worksheet, students select the answers to given questions, clicking on their choice. Score can be checked online.

Students consider important structures in their community -- specifically, those structures that have had a great impact on the history of their community.

Fourth graders are introduced to the process of prehistoric hot rock cooking in earth ovens on the Edwards Plateau of Texas. They explain the steps used in the hot rock cooking process.

The bubonic plague, which killed around 1/5 of the world's population in the 14th century, is still around today -- but it now claims only a few thousand lives each year. How did that number shrink drastically? This learning module...

In this activity, students will be given a hypothetical piece of property to study and apply the requirements of the National Environmental Policy Act (NEPA) to make recommendations about the possible land use.

A teacher's guide and unit plan that explores the migration of people from within and to the United States in the early 20th century up to the present day, many of them to work in the automobile factories in the northern US. Additional...

This Skillswise site focuses on verb tenses. Included are a video about why learning about tenses is important, fact sheets and worksheets for instruction, quizzes on the information presented, and games to practice the skill. The...

Essay on population growth past, present and future and the impact on society. Includes guiding questions for students and links to related resources.

This page explains the three major verb tenses: past, present, and future with examples. It also offers links to information about each of these as well as the perfect, continuous, and perfect continuous of each.

This grammar page teaches the sequence of verbs, including simple present and past, present and past perfect, future, future perfect, and infinitive verbs. Includes chart and examples. L.11-12.4b Patterns/changes

Learn about the 1921 Tulsa Race Massacre, on the one hundredth anniversary of the crime, and how the community of Tulsa is coming to terms with its past, present, and future. This Collection includes the following: Video (6), Media...

Learn about the birds of Sydney Australia. See how the number of species have changed over time and learn what those changes can tell us about Sydney's past, present and future bird populations.

From the center of America's high-tech industry, the Silicon Valley Art Museum showcases the talents of artists-- past, present, and future-- who explore the connections between art and technology. Through a variety of high-interest...

From the center of America's high-tech industry, the Silicon Valley Art Museum showcases the talents of artists-- past, present, and future-- who explore the connections between art and technology. Through a variety of high-interest...

How many different verb tenses are there in a language like English? At first, the answer seems obvious- there's past, present, and future. Anna Ananichuk explains how thanks to something called grammatical aspect, each of those time...

Practice skills with past tense verbs by choosing the best verb to fill in the blank in each sentence on this worksheet.

This lesson introduces the simple present tense and how it is used. This tutorial lesson shares a short slideshow with the lesson's content.

Practice skills with past tense verbs by circling all of the past tense verbs in the ten sentences on this learning exercise.

Change the verbs to past tense in each of the ten sentences in this exercise.

[Free Registration/Login Required] This flipchart was created in a baseball game format to practice past-tense verbs for a 2nd grade classroom.

In this lesson, young scholars will learn that iron ore is a Minnesota natural resource. Students will gain an understanding of the geological history of the Iron Range and evaluate its past, present, and future in regard to their economy.

Explore the past, present, and future of money. Learn about exchange rates, money forms, banking, and more.

The interactive NOVA Polar Lab uses 360 degrees videos, interviews with scientists, and mini-games to send students on an immersive quest to understand how the poles are key to understanding Earth's climate -- past, present, and future.