For elementary school students there are several excellent historical fiction books available such as White Star Line: A dog on the Titanic, Dear America's Voyage on the Great Titanic: The Diary of Margaret Ann Brady, and Magic Tree House: Tonight on the Titanic.
The Website Ocean Explorer
Ocean Explorer leads you to comprehensive lesson plans for grades 5-6, 7-8, and 9-12 revolving around the science of ocean exploration such as marine archaeology and bio-deterioration.
The Passenger Lists on Encyclopedia Titanica
Encyclopedia-Titanica.org can be used for a large variety of statistical, graphing and database assignments. For example, what percentage of first-class passengers survived, as compared to second or third? What was the ratio of men to women on the Ship? What was their ratio for survival? See chart with these numbers.
Titanic commercial cargo manifest
Titanic-Whitestarships.com has the cargo manifest that originally appeared in newspapers soon after the sinking. This list is an excellent source for math problems.
The Website Anderson, Kill, & Olick: Estate of Hans Jensen vs. The White Star Line
www.andersonkill.com/titanic/home.htm features a mock trial in which a victim's family sues the White Star shipping company for negligence.
Voices from the Titanic
http://www.create.cett.msstate.edu/create/classroom/lplan_view.asp?articleID=67 you will find examples of a Titanic-related language arts activity for upper grades. There are also many existing lesson plans online to coordinate with well-known Titanic-related stories, such as Walter Lord's A Night to Remember.
A&E and national geographic
Both A&E and National Geographic have study guides available to coordinate with their Titanic documentaries: Biography.com www.aetv.com/class and National Geographic Xpeditions www.nationalgeographic.com/xpeditions