COGLAB is an interactive online laboratory where students can run demonstrations of more than 50 classical experiments and concepts from cognitive psychology. COGLAB lets the instructor set up class groups online and track the results when students interact with each of the cognitive demonstrations. Students can collect and analyze real data based on their specific class group. This hands-on experience helps students understand each experiment, its underlying cognitive concepts, the data, and the significance of the study. COGLAB can be accessed on the Internet from anywhere in the world by using any supported web browser.