<p>From the reviews:</p><p>“This book is the outcome of a decision by the ICMI Executive Committee in July 2002 … . recommended to all researchers interested in the aspects of the use of digital technologies in mathematics education. It gives an excellent overview of the state of the art of the actual research and a genetic view of the development of this research in the past (20 years). It may serve as a starting point for all young researchers in the field of technology.” (Hans-Georg Weigand, ZDM Mathematics Education, Vol. 42, 2010)</p><p>“This study volume is the outcome of the 17th Study conference held under the auspices of the International Commission on Mathematical Instruction (ICMI). … it is a very valuable compendium for anyone interested in mathematics education and digital technology. … The book is well written and has been well edited. … it is certainly a very valuable reference work to the field, in reporting on current concerns, giving examples of current work and giving some ideas on directions for the future.” (Kaye Stacey, Educational Studies in Mathematics, Vol. 78, 2011)</p>