1. Models for social systems and for their languages

   • Gordon Pask

   OriginalPaper Pages: 395 - 445

2. The logic of questions and its relevance to instructional science

   • David Harrah

   OriginalPaper Pages: 447 - 467

3. Computer-assisted instruction for dispersed populations: System cost models

   • John Ball
   • Dean Jamison

   OriginalPaper Pages: 469 - 501