The Data and Story Library (DASL) is a collection of small and simple data sets useful for teaching basic statistical concepts. It was originally housed at the Carnegie-Mellon website, but (like many classic websites) it disappeared one day. The nice folks at Data Description, Inc. (makers of Data Desk software) have revived and updated this resource.
Data Description, Inc. Welcome to DASL – The Data And Story Library. Available in html format.