ABLE -- Alternative Basic Library Education
http://libraries.idaho.gov/able
An Idaho Commission for Libraries site designed for library staff members who have no formal library education. Topics include collection assessment, materials selection, weeding, MARC cataloging, Dewey classification and reference services. A good introduction for employees new to the library, and also a good resource for solo school librarians who do a little bit of everything.

SABLE -- Idaho's Supplemental Alternative Basic Library Education
http://libraries.idaho.gov/sable
A supplement to the ABLE courses. Topics include programming and services to children and young adults, cataloging music sound recordings, and interlibrary loan.

MARC21 Tutorial
http://www.lib.usm.edu/~techserv/pdc/marc21_tutorial_ie/
A tutorial based on Understanding Marc Bibliographic for an introduction to cataloging with MARC. Explains tags, indicators, and subfield codes. There are short quizes throughout.

Ohio Library Council -- Online Learning
http://www.olc.org/orientation/
There are acutally three tutorials that can be accessed from this page: Ohio Reference, Staff Orientation, and Library Marketing. The information in these tutorials is probably too basic for experienced library staff, but may be a good starting point for student aides or other volunteers.