Like most content from the internet (and even from print!), quality of webquests can vary dramatically. Even high quality webquests also must match the needs and circumstances of your classroom, too. The first criterion for a webquest, then, is that it match with your students, curriculum and circumstances. Choose resources designed for your grade level, that match your students’ level of internet experience, and that cover topics related to your curriculum. The best webquests are interdisciplinary in nature, so you might be able to find examples that could be joint projects across several curricular areas.
Secondly, webquests should have clear assignment and directions sections. They should have well-written rubrics to use in evaluating the final product(s). All links, web references, and required printed materials need to be current and readily available.
A good webquest moves students beyond the lowest levels of learning (rote memorization and regurgitation of simple facts) and into analysis, critique, evaluation and synthesis. It should challenge your students at a number of levels so that all can participate and benefit, from struggling students who need more academic assistance to talented students who need wider and deeper challenges.
Finally, the webquest needs to have a realistic and relevant end product. Preferably, it offers a range of evaluation projects that allow students to respond in ways most suited to their particular combination of strengths and skills. Need some further guidance? Check out Webquest 101.