I had a sketch assignment to do, so I picked owls. I just had to sketch them using different pencils and then label them for which pencil I used. 6B is the highest, darkest pencil. As the scale goes down the pencil gets lighter till you get to HB. Most people use the HB pencil, but it's a nice balance of both the B pencils and the H pencils. My 6H pencil was unavailable, so I used 4H. As you go up the H scale to 6H it get's lighter. I also learned that if the pencil is marked with an F, it means that it is a fine tip.
Just like they are marked, the drawings are of one pencil each except the bottom right one. I used all 3 on it.
