This article reports the results of a study that explored the applicability and effectiveness of a GIS-based exercise implemented by a teacher on a single computer in an ordinary classroom. The GIS-based exercise was implemented in two different environments with two different groups of students. The study reveals that implementing GIS exercises in a classroom with one teacher demonstrating it on a single computer can be an effective teaching and learning method especially for schools in which there is a lack of computing resources available to geography teachers. (Contains 6 figures and 4 tables.)