The work described in this paper is part of a larger project, called InterQuest, which is dedicated to establishing effective models and methods for teaching using Internet technology, especially the World Wide Web. Features of two InterQuest projects, CalculusQuest and QuestWriter, are discussed. CalculusQuest is a first-term differential calculus course based entirely on the Web. It was developed around a set of performance objectives and in accordance with the principle that technology should serve pedagogy. QuestWriter is an environment for administrating and authoring general Web-based courses. QuestWriter includes tools for creating classes and setting up student authentication. It can record, evaluate, and react to the results of on- and off-line activities. It enables instructors to author and administrate question-based activities (for example, savable quizzes with feedback) and communication activities (pedagogically driven guided student exchanges). This paper focuses on those aspects of CalculusQuest and QuestWriter that use Web technology for specific pedagogic purposes. (Author/DLS)