University of North Carolina
Unc: Harriet: The Moses of Her People
E-text of a book with primary and secondary source information about Harriet Tubman by Sarah Bradford published in 1886. RI.9-10.7 different mediums
Other
Hypertextbook: Large Molecules
This is a good, in-depth reference for the study of macromolecules in biology - lipids, proteins and carbohydrates. Includes images and links to other sources as well as a quiz for students to check understanding.