This document discusses the theory and application of a guided inquiry learning approach in a web-based learning environment. It begins by introducing constructivism as the underlying learning theory, which asserts that meaningful learning occurs through active involvement such as inquiry-based discovery. It then discusses two models of guided inquiry - Lawson's learning cycle and Collins and Stevens' theory of inquiry teaching. The paper provides an example application in a web-based learning environment, adapting Lawson's model and Collins and Stevens' strategies to design inquiry activities. The guided inquiry approach aims to stimulate learners' discovery and understanding through questioning, exploration of information, and application of new concepts.