Why are you considering these specific units for your school? Or more to the point, what requirements do you have for wireless mics (range, price, compatibility, etc)? With this information I can see if the ATW-2000 would be appropriate for you, or whether another unit would be better suited for you.
You'll find the ATW 2000 series to offer excellent fidelity and reproductive clarity. The only down side would be you're limited to a maximum of 20 channels of operation. If you need more look at the ATW 3000 series.