All programs are presented with a manual which contains not only technical specifications and instructions, but also educational suggestions for exploring the program addressing the needs of both teachers and pupils. In some cases, ancillary materials (e.g., biographies, curiosities, related issues) are enclosed.

     The need for good pedagogical quality in designing software for science learning is recognized (Ref. 7). We know, from our experience on software production and evaluation, how bad the effect of using a fancy computer program may be when its learning content is deficient or inadequate. For instance, one of our goals in software design is to reduce the "speed" of many pupils when using computers. For that, user's protocols centered in step-by-step learning content have proved to be useful. Our latest programs contain a «guidebook» with questions and challenges and we have just finished a generic tool to build on-line manuals to explore software in educational context.