Comparative Review of ActivStats, CyberStats, and MM*Stat I ntroductory statistics courses are commonly considered to be difficult and boring by students. Students are required to simultaneously develop a variety of skills including quantitative and graphical insights along with mathematical and analytical abilities (Härdle et al. 1999). Also, it is sometimes difficult for students to relate statistical concepts presented in class to real world problems and everyday situations. The idea to use computers to increase transparency and motivation when teaching statistics dates back to times before the PC and the Web became widely popular. Computers in teaching statistics are especially helpful in reducing the need for lengthy manual calculations, facilitating graphical data analysis, and illustrating statistical concepts by means of simulation experiments (Snell and Peterson, 1992). Modern electronic textbooks, combined with an underlying statistical software package, include, in addition, interactivity, hands-on exercises, colorful applets, well-documented real-life examples, and the possibility to analyze even larger data sets quickly and effectively. There are many statistical teachware packages and electronic textbooks available. Some of them are freely accessible via the Internet, such as the GASP educational procedures (West et al.