I am looking for case studies on the Information Systems Strategy & Management.
The Business Source Complete and ABI/Inform databases, which you can get to through this page http://library.uhd.edu/business, includes case studies. Go to BSC, then select Publications from the very top of the page. In the second search box on the page type: Case study. Then below the search box, click on the circle next to "Match any words". You will get the whole list of case studies available.
An Internet resource called Case Place at http://www.caseplace.org/ is another source. They focus on social, environmental, and ethics issues in business, and are a clearinghouse for other people to put up cases. Some of their cases may have teaching notes.
There is a journal we subscribe to, Journal of Cases on Information Technology. You can access it at http://library.uh.edu/record=b4219383~S14 . It's part of the InfoSci Journals collection by IGI Global.