Here is a comparison (http://teachinglearningresources.pbworks.com/w/page/19919544/Constructivism):
Definition: Constructivism is a theory of learning that is developed from the principle of children's thinking. Constructivism states that children learn through adaptation..
Do I understand it better now? I don't think so. But I am certainly making adaptation in my teaching and testing theories more. To illustrate it further I have uploaded a video I prepared in today's MindLab classroom. The activity was created with Makey Makey (a circuit board like stuff) and a visual programming tool called Scratch. Quite interesting venture and it worked for all MindLabbers.