H1b Visa to F1 and then back to H1B

I will be traveling to US on H1B in Dec 2016 and planning to join B school in 2018 batch.

Is it possible to change the status from H1B to F1, considering I will be joining B school in US (MBA - Finance) and then changing my status back to H1B?

My Concern is that will my H1b valid once I am post graduated from B-school?