This post probably explains it pretty well.

The new logo and design changes serve multiple functions. The primary motivation is to improve the user interface and user experience of steemit.com. The other important function is to clarify the distinction between Steem and Steemit.

The Steem blockchain supports a whole ecosystem of applications, most of which have been created by independent developers in our community. The Steemit company and Steemit website are a part of this ecosystem, but they are not the entire ecosystem.

...The Steemit brand and logo are protected by intellectual property laws, including copyright and other proprietary rights of the United States and foreign countries. This is to allow Steemit to protect the brand and logo in ways that extend user safety. One may not make unauthorized commercial use of, reproduce, prepare derivative works, distribute copies, perform, or publicly display the Steemit logo or brand, except as permitted by the doctrine of fair use or as authorized in writing by us.

I think @transisto takes some issue with the use of "Steemit" in the title. Depending on your intention, I think it might fit under fair use, but I am no lawyer. The easiest, and most appropriate course of action would probably be to change it to "Steemschool" instead. As the the referenced post further clarifies...

The Steem logo is licensed under Creative Commons CC0, meaning you’re free to copy, modify, or distribute (even for commercial purposes) without needing to ask permission or give attribution.