For example, certain skills might best be trained by using methods derived from behavioral psychology. Keyboarding is one of those skills. Teacher facing students who present behaviors that are very difficult to manage in classroom environments might need to use some form of behavior modification to instill order in the classroom. Behavior modification comes directly from behavioral theory. Students who lack significant cognitive ability, such as those with severe or profound mental retardation, might not be able to benefit from contemporary cognitive theory as much as they can from traditional behavioral theory. At least, that is, within the parameters of our current knowledge of such severe anomalies.