Study Support for academics and research Lowell Databases Resources for Research Libguide featuring access to databases, primary sources, support for research projects and Noodletools Instructional Videos and Screencasts Projects by Departments Links to Libguides and resource pages Online Textbooks We have LHS textbooks to check out and use while studying in the library. Check below for some of the titles available as Online Textbooks. AP Economics Economics: Principles, Problems and Policies, by McConnell & Brue. 17th ed., 2008 SFUSD NGSS Textbooks Biology, Physics and Chemistry available