Here is a webquest worksheet that coincides with the Scholastic webpage: http://teacher.scholastic.com/activities/lewis_clark/prepare.htm
This webquest takes them throughout the whole webpage, covering most of the United States' acquisition of the Louisiana Territory and Lewis and Clark's exploration of that territory.
Lewis and Clark Webquest
by Ryan Royer
is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License