1: Modeling Tools for Students and Teachers.- 1. Modeling Clay for Thinking and Learning.- 2. Training System Modelers: The NSF CC-STADUS and CC-SUSTAIN Projects.- 3. Construction of Models to Promote Scientific Understanding.- 4. A Visual Modeling Tool for Mathematics Experiment and Inquiry.- 5. Decentralized Modeling and Decentralized Thinking.- 6. An Object-Based Modeling Tool for Science Inquiry.- 2: Model-Based Inquiry.- 7. GasLab: An Extensible Modeling Toolkit for Connecting Micro- and Macro-properties of Gases.- 8. Designing Computer Models That Teach.- 9. Modeling as Inquiry Activity in School Science: What's the Point?.- 10. Alternative Approaches to Using Modeling and Simulation Tools for Teaching Science.- 3: Toward Extended Modeling Environments.- 11. The Developing Scientist as Craftsperson.- 12. Multisensory Immersion as a Modeling Environment for Learning Complex Scientific Concepts.- Conclusion: Introducing Modeling into the Curriculum.- Appendix A. Websites of Contributing Authors.- Appendix B. Contents of Enclosed CD-ROM.