The goals for school mathematics education set recently by the National Council of Teachers of Mathematics (NCTM) set a premium on learning through multiple mathematical perspectives. One of these perspectives is historical. The modules collected...are designed to provide this view for topics at the core of the standard mathematics curriculum from middle school through high school. The modules richly succeed in this goal, but that is only a small part of a much more ambitious project. By providing copious and relevant activities, students and teachers are invited into first-hand experiences of the mathematics of the past, enriching their standard work, and obtaining valuable motivation for some important ideas. This collection was an ambitious project: there are 11 modules, written by 29 authors with assistance from six editors together with the two main editors. Many of the authors have positions in high schools and know their audience -- the student pages are well-posed, and the teacher's resources are well-crafted...