We understand that there are some students who are having issues with the USB WiFi adapters. We have found 3 that we know are working well. One we have purchased at the school and 2 which students have provided information about their usage.
We purchased this one for some of our machines. It has been tested with different students and all of them have provided positive feedback: USBNOVEL Dual Band
These are the 2 that students have used.