Each publication in the Eisenhower National Clearinghouse (ENC) Focus series presents a small selection of the Clearinghouse collection focused on a topic of particular interest to mathematics and science teachers. In addition to meeting general requirements for inclusion in the ENC collection, curriculum materials in the Focus series are: appropriate to the specific topic of the issue; support hands-on, active, inquiry-based methods of instruction; and are readily available. This issue offers a sampling of 20 useful teaching materials and other resources that incorporate principles about data reflected in mathematics and science education. Each one-page entry includes the title, author, date, publisher, grade level, target audience, material type, language, subjects covered, abstract, evaluation, and ordering information. Titles Include: "Data Analysis and Statistics across the Curriculum,""Patterns and Predictions," and Internet Activities Using Scientific Data." (MKR)