Thou shalt integrate disciplines. If you want to become a stockbroker, a lawyer, a commercial truck driver, a ship's captain, or an engineer, you study a specific content. You gain a great volume of knowledge and then process it. After the learning, you can analyze, synthesize, and make judgments and evaluations. You also have a better chance of passing the test.
Educational theory rests on quicksand.
It assumes that problems can be solved using strategies, techniques, and thinking processes without having solid background in a given area. The same could be said about your heart surgeon, lawyer, or plumber. Good thinking usually comes from good information. It helps to understand what a democratic classroom is. The teacher is not an authority figure in a democratic classroom.