CD-ROM contains a) slideshow introduction to the series philosophy and organization, b) description of each component in the package, c) animated tour of the instructional sequence in an investigation, d) video footage of math workshops, e) print resources. Newer copies do not contain CD but have online content. User name and Password information provided on kit.

Overview book. Investigating multiplication and division, grades 3-5 / Catherine Twomey Fosnot -- Unit books. [1] Groceries, stamps, and measuring strips: early multiplication / Frans van Galen, Catherine Twomey Fosnot -- [2] The big dinner: multiplication with the ratio table / Catherine Twomey Fosnot -- [3] Muffles' truffles: multiplication and division with the array / Antonia Cameron, Catherine Twomey Fosnot -- [4] The box factory: extending multiplication with the array / Miki Jensen, Catherine Twomey Fosnot -- [5] The teachers' lounge: place value and division / Chris Natale, Catherine Twomey Fosnot -- Resource books. [1] Minilessons for early multiplication and division: a yearlong resource / Willem Uittenbogaard, Catherine Twomey Fosnot -- [2] Minilessons for extending multiplication and division: a yearlong resource / Catherine Twomey Fosnot, Willem Uittenbogaard and 17 posters.