First graders explore river rocks. Searching with screens and containers, 1st graders identify the different kinds and sizes of rocks. They separate rocks into containers according to pebbles, gravel and sand. Students write about their...

Student matches the initial letter of his/her name with the corresponding letter on the clothesline. They then participate in the classroom discussions by offering information relevant to the topic and answering or asking questions...

Third graders watch a demonstration on how craters were formed on the moon. Individually, they care given a set of materials that represent the moon surface and make their own craters. To end the lesson, they measure the size of the...

Third graders investigate how water is released from different plants into the atmosphere. They observe and investigate two types of plants with domed lids with condensation and communicate those observances and inquiries on an in-class...

Students locate something in the classroom that is the same color that is written on the card they were given and go stand by it. They share what they found and place their card on a color posted next to the correct color. Finally,...

Students experience and practice compositing and recycling through hands-on-activities. They distinguish between which items from their trash can be recycled, composted and reused. The process for making recycled paper is also covered in...

In this cloze worksheet, students read a passage and fill in blanks with words from a word list. The passage is about the sense of sight.

In this Maine worksheet, students complete a 10 question multiple choice on-line interactive quiz about the state of Maine. Included are facts about history and famous people.

Learn what a black hole is and explore the latest scientific theories about how they form.

Article reports on a theory from Stephen Hawking that postulates there may be a possible "emergency exit" from black holes. Includes a video [9:06]

Article reports on the discovery of a supermassive object 90 million light-years from Earth that may be an orphan black hole.

Article reports on new findings about the beginnings of black holes.

This site explores black holes in an easy-to-understand format. Answers such quesitons as, "What are black holes?" and "Do black holes really exist?"

This is an interesting and comprehensive resource for black holes. In addition to teaching you about black holes, it has quizzes to test your knowledge of the topic and a link to share your own essay on black holes.

This NASA teacher's guide provides educators with background information and classroom activities about black holes. Requires Adobe Reader. [PDF]

Article outlining the scientific history behind the discovery of black holes. The writer discusses how scientific theories guide scientists in creating explanations for natural phenomena.

Learn about the discovery of gravitational waves made from two black holes colliding over a billion years ago!

Models of star formation don't match the true star number. Now see how the black hole restrains news stars so everything adds up.

Black holes seem to be a constant point of debate for astronomers. This article confirms the theory that black holes can help form massive stars and gives more support to the idea that black holes play a big role in galaxy formation....

Black holes seem to be a constant point of debate for astronomers. This article confirms the theory that black holes can help form massive stars and gives more support to the idea that black holes play a big role in galaxy formation....

This site from the National Aeronautics and Space Administration allows one to play "Falling into a Black Hole," and take an imaginary trip to a black hole right now!

College-level physics course focusing on black holes. Course topics include general relativity, astrophysics, and elements of cosmology . Course features include selected video lectures, lecture notes, assignments, and exams.

Fabio Pacucci examines the probability of Earth being gobbled up by a black hole.

[Free Registration/Login Required] Watch a clock slow down in the strong gravitational field near the event horizon of a massive black hole. A PDF worksheet and a video tutorial are also available. [2:57]