You don't even know what you're talking about. First, it's spelled "write-down", not "rightdown".
Second, there's really not much for Apollo to actually "write-down". MORE THAN HALF OF APOLLO GROUP'S BALANCE SHEET IS CASH AND SHORT-TERM, LIQUID SECURITIES. It's got a small amount of intangibles it could write-down, but that's about it. Their balance sheet is just a bunch of cash, buildings, land and equipment.
You don't know what you're talking about. You've probably read some articles about for profits and assume their stocks are going nothing but down. The fact is that some of the better companies in this industry have a lot of cash and have strong profit margins. There are bad for profits, such as CECO and COCO; those companies are in serious trouble, but APOL, DV, STRA and ESI have room to absorb continued contraction in this industry.
If you're going to invest, stick to mutual funds. You're going to lose money investing on your own.