This book consists of 13 papers developed by participants in the ICME 13 Topic Study Group 40 on Classroom Assessment. The individual papers discuss various aspects of classroom assessment, focusing particularly on formative assessment as assessment for learning, and are grouped into four main sections: Examples of Classroom Assessment in Action, Technology as a Tool for Classroom Assessment, Statistical Models for Formative Assessment, and Engaging Teachers in Formative Assessment. The book opens with a brief discussion of the use of formative assessment as a critical component of the teachinglearning process and concludes with an overview of lessons learned and ideas for future research. It is of interest to classroom teachers, university teacher educators, professional development providers and school supervisors.

Preface.- Section I. Introduction to the Volume.- 1. Formative Assessment: A Critical Component of the Teaching-Learning Process.- Section II. Examples of Classroom Assessment in Action.- 2. Formative Assessment Lessons.- 3. Observations and Conversations as Assessment in Secondary Mathematics.- 4. Using Self-Assessment for Individual Practice in Math Classes.- Section III. Technology as a Tool for Classroom Assessment.- 5. Using a Digital Flip Camera: A Useful Assessment Tool in Mathematics Lessons.- 6. The Use of Digital Technologies to Enhance Formative Assessment Processes.- 7. Resources and Constraints Designed to Support Online e-Assessment of Problem Solving.- 8. Suggestion of an E-Proof Environment in Mathematics Education.- Section IV. Statistical Models for Formative Assessment.- 9. Cognitive Diagnostic Assessment (CDA): An Alternative Mode of Assessment for Learning.- 10. Validating and Vertically Equating Problem-Solving Measures.- Section V. Engaging Teachers in FormativeAssessment.-  11. Assessment in Mathematics: A French Study Based on a Didactic Approach.-  12. Assessing Visualization: An Analysis of Chilean Teachers Guidelines.-  13. Formative Assessment and Mathematics Teaching: Leveraging Powerful Linkages in the US Context.- 14. Designing for Formative Assessment: A Toolkit for Teachers.- Section VI. Conclusion.- 15. Looking to the Future: Lessons Learned and Ideas for Further Research.