A Diverse System Delivers for Pre-K: Lessons Learned in New York State

Today, policymakers with an interest in school success no longer debate why states should provide pre-kindergarten; that case has been made successfully to voters, educators, and researchers. Instead, policymakers now wrestle with how to get the job done. Increasingly, they turn to what those in the pre-k field call 'diverse' or 'mixed' delivery, which uses both community-based and school sites to provide pre-k services. This report examines the experience of one state - New York - using a diverse system to deliver pre-k services and provides lessons for other states as they build and expand their pre-k programs

A NASA initiative: Software engineering for reliable complex systems

The objective is the development of methods, technology, and skills that will enable NASA to cost-effectively specify, build, and manage reliable software which can evolve and be maintained over an extended period. The need for such software is rooted in the increasing integration of software and computing components into NASA systems. Current NASA Software Engineering expertise was applied toward some of the largest reliable systems including: shuttle launch; ground support; shuttle simulation; minor control; satellite tracking; and scientific data systems. Unfortunately, no theory exists for reliable complex software systems. NASA is seeking to fill this theoretical gap through a number of approaches. One such approach is to conduct research on theoretical foundations for managing complex software systems. It includes: communication models, new and modified paradigms, and life-cycle models. Another approach is research in the theoretical foundations for reliable software development and validation. It focuses upon formal specifications, programming languages, software engineering systems, software reuse, formal verification, and software safety. Further approaches involve benchmarking a NASA software environment, experimentation within the NASA context, evolution of present NASA methodology, and transfer of technology to the space station software support environment