Constructing content around mathematical concepts or ideas The whole program is developed around central topics, each of which is presented as a stand-alone learning system.   Mathematical tools rather than specific algorithms Instead of teaching a collection of separate algorithms for each individual case, the most general way is presented, which is always applicable. Example: Instead of teaching a separate algorithm for equations of each order, the solution is always presented as a comparison between two functions, (with the aid of the computer).   Contents that manifest the importance of mathematical language as a tool for describing natural events There is a demonstration of the power of mathematics in phrasing that facilitates generalization, prediction, analysis, change, etc.   In the computer area: Concepts that lend themselves to multi-representation. The computer's capability to examine an idea from various related aspects is utilized. Ideas for Inquiry The computer's capability for generating a great variety of examples is utilized.