prepare the board

i am stuck in the lab, I have a marker and eraser and on the grease board seems to be something I can do before putting up all the pictures to investigate. please help. I have been stuck for about 3 days now

Me too!

You have to draw a grid. If you look closely you will see a set of faint horizontal and vertical lines. Go over them with your marker.

Thanks for that, Mr. Russ..!!