One morning one of my students was having a hard time finding his spelling words. This is not common, and sometimes just an excuse to get out of working. We went to check out his desk when I found a disaster. (I may have known it was building up, but just didn't know how bad.) When he wasn't willing to search, I tipped his desk over so we could find things a little more quickly.
Most of the papers/notebooks/junk fell out, but there was still some stuff left in his desk. I peaked in and saw a ton of pencils.
"Why do you have 100 pencils in your desk?" -- me
"It's not a 100" -- boy
"I'll count while you clean up this mess." (I said to myself)
I found 93 pencils in his desk. It was insane. Then I saw his pencil box and when I went through that my count was to 114. I was happy to tell him he had over 100 pencils in his desk.
He now has a very clean desk, and I have a lot of pencils. I will be keeping my eye out for future hoarding going on in class.