I've experienced it in my room. It has a magical, satisfying feel to it. I've also experienced what the untrained eye might believe is flow but is actually a classroom of compliant students who are simply on task. It's all a masquerade. So how we do convert those on-task moments into ones where students are completely engaged? This blog post below offers some wonderful suggestions. It's an inspiring read.
So wait no further.
Go find your flow.
Click on the graphic to read the post.