The answer to this age-old question is that the modern can and can opener were invented at exactly the same moment. This had to be true because a can without a can opener (yes, they existed) is of very little value, and a can opener without a can is the sound of one hand clapping (i.e., less than worthless).
The can and the can opener are together a system. Between them, they make it possible to preserve, transport, and distribute foods.
In educational innovation, we frequently talk as though individual variables are sufficient to improve student achievement.
School Leadership 2.0 is the premier virtual learning community for school leaders from around the globe. Our community is a subscription based paid service ($19.95/year) which will provide school leaders with outstanding resources. Learn more about membership to this service by clicking one our links below.