A New York Times article (http://www.nytimes.com/2011/01/21/science/21memory.html?_r=1&ref=science) based upon a recent Purdue study by Jeffrey D. Karpicke and Janell R. Blunt shows that when students take tests they learn science better than when they use study aids such as concept maps and other learning devices.
Purdue study abstract:
Educators rely heavily on learning activities that encourage elaborative . . . → Read More: Does taking tests help students learn science?