Day 3 - Seven Day Black and White Challenge : My blackboard

Here's my photography from the Day 3 for the #sevendaybnwchallenge:

I was nominated by @nomadics. Thank You!

The Challenge:

7 black & white images that represent an aspect of your life...

Present one image every day for 7 days.
No people.
No explanation.
Nominate someone every day. Although anyone can join in.
Use the tag #sevendaybnwchallenge as one of your five tags