NOAA
Noaa: National Ocean Service: Education: Tides and Water Levels
A great resource for explaining and understanding tides. Find out what tides are and why it is so important to monitor them. This is an extensive tutorial followed by a set of review questions. All of the information can be downloaded as...
CK-12 Foundation
Ck 12: Earth Science: Tides
[Free Registration/Login may be required to access all resource tools.] Reveals tidal patterns and that tides are caused by the gravitational attraction of the Sun and Moon to Earth.
CK-12 Foundation
Ck 12: Earth Science: Tides Study Guide
[Free Registration/Login may be required to access all resource tools.] This study guide summarizes key points about the different types of tides and the Moon's effect on Earth's tides. Includes a few questions to check for understanding.
Enchanted Learning
Enchanted Learning: Earth's Oceans Tides
This site explains what tides are and the difference between Proxigean Spring Tides, spring tides, and neap tides, and how these are formed. Graphic illustrations are provided.
Other
Moon Tides: How the Moon Affects Ocean Tides
Discusses the different kinds of tides, high and low tides, lunar tide facts, questions people have asked about tides, and causes of tides.
PBS
Pbs Learning Media: Coastal Geological Processes
This interactive resource adapted from the National Park Service describes the many forces that affect shorelines, including tides, weathering, erosion, and deposition. Includes background reading handout and discussion questions.
Soft Schools
Soft Schools: Earth Science, Tides Quiz
For middle grades. Using your knowledge of tides, answer the following questions.
Museum of Science
Museum of Science, Boston: Ebbs and Flows of the Sea
A simple one-page explanation of oceanic tides. Includes instructions for completing a tide-mapping activity.