It is bad enough to reinvent the wheel. What really hurts is when they reinvent the flat tire.
As we have come to view teaching, it begins with an act of reason, continues with a process of reasoning, culminates in performances of imparting, eliciting, involving, or enticing, and is then thought about some more until the process can begin again
Sometimes you think in order to act, sometimes you act in order to think.
If philosophy begins in wonder, pedagogy typically begins in frustration.
Only when we have something to value, will we have something to evaluate.. and we cannot value something that we cannot share, exchange, and examine.