Use this lesson plan from National Geographic Education to explore rivers and their watersheds, using where they live as an example. Necessary vocabulary for the lesson is included as well as a puzzle for students to figure out that...

Assemble a puzzle of the United States to test your knowledge of its geography.

An explanation of genomes in regards to the amount of DNA compared to the number of chromosomes in different organisms. Additional discussion focuses on how the human genome is different from other species.

Text of the short story "The Puzzle" by an unknown author. (Free site registration offers some additional features, e.g., the ability to insert annotations.)

Print out a crossword puzzle game about Art History on this site.

An interactive crossword puzzle about art history can be found on this site.

An interactive crossword puzzle to test students knowledge of World War I.

An interactive crossword puzzle reviewing over the geography of the United States.

Print out a crossword puzzle game about the geography of South America on this website.

An interactive crossword puzzle game about Native Americans. Test your knowledge of the history of the Native Americans.

Test your knowledge of Mesopotamia with this interactive crossword puzzle game.

Print out a crossword puzzle game about Martin Luther King, Jr. Learn about history and have fun at the same time.

Print out a crossword puzzle game about Explorers. Learn about history and have fun at the same time.

Print out a crossword puzzle game about Civil Rights. Learn about history and have fun at the same time.

In this instructional activity learners will work collaboratively to research information in order to prove or disprove if a super continent ever existed. Students will create a model of Pangaea to show how their research findings...

This resource provides an interactive game for students to practice using variables.

This is a list of 22 vocabulary words and a variety of interactive puzzles and activities on the theme of football at the college and pro levels. A list of 310 football words is also provided.

Here is an interactive and printable crossword puzzle developed by the New York Times Learning Network. The theme of this puzzle is Rocks and Minerals.

Here is an interactive & printable crossword puzzle developed by the New York Times Learning Network. The theme of this puzzle is State Capitals.

An interactive & printable crossword puzzle developed by the New York Times Learning Network. The theme of this puzzle is Ancient Greek Theatre.

Jelly Doods is a fun puzzle game for both children and adults! Slide the jellies around the screen to combine all the matching colors. You only have so many moves to complete each puzzle, so make sure you plan accordingly!

In this Cyberchase video segment, Wicked and Digit solve a fraction puzzle in order to move on in their quest to save the CyberSquad.

Test your knowledge of the Greek goddess Aphrodite with this crossword puzzle.

Test your knowledge of the Greek God Apollo with this crossword puzzle.