Taking Inventory recounts the journey of K-1 students as they inventory materials in their classroom. In the process, they develop number sense, counting strategies, and the big ideas underpinning place value.

In their "Young Mathematicians at Work" series, Catherine Twomey Fosnot and Maarten Dolk described Mathematics in the City, an innovative project where teachers helped young children construct a deep understanding of number and operations in a math workshop environment. Now they and two colleagues from the project have developed a 21st-century approach that provides pre- and inservice teachers with an interactive, video-based, digital context for inquiry into the teaching and learning of mathematics. Designed for workshop participants and preservice teachers, the "Taking Inventory CD-ROM" offers users a multi-media learning environment for professional development on topics ranging from instruction to assessment, that stimulates action, reflection, and discussion with dynamic video clips, children's work samples, and interviews with students and teachers. In "Taking Inventory, K-1" students inventory materials in their classroom, along the way, developing number sense, counting strategies, and the big ideas underpinning place value. The CD-ROM helps teachers examine children's numeric thinking; investigate their strategies; and analyze how they model their world mathematically. Users also study teachers at work: designing rich contexts for problem-solving; drawing connections between mathematical ideas and strategies; and developing a vibrant mathematical community.System Requirements for CD-ROMWindows/PC Pentium II Processor 266Mhz (or higher) Windows 98 (or higher) 64 MB RAM (more recommended) SVGA Color Display (or better) 4X CD-ROM Drive (or faster) Sound Card 16-bit Flash Player and Acrobat ReaderRG Quicktime 6.0 (or higher)MacIntosh PowerPCProcessor G3/233Mhz (or higher) System 9.2 (or higher) 64 MB RAM (more recommended) SVGA Color Display (or better) 4X CD-ROM Drive (or faster) Sound Card 16-bit Flash Player and Acrobat ReaderRG Quicktime 6.0 (or higher)