Go to your WiFi settings and choose D87-Authenticated as the network you want to connect to.
You should get the following page (note not all devices will look exactly like this but the options should be similar).
Leave the first two options as they are (EAP method - PEAP / Phase 2 authentication - None)
The next 3 options you will do some configuration changes as seen below
For CA certificate change this option to "Do not validate"
For Identity and Anonymous Identity put in your district credentials followed by @district87.org
The final spot is for your current password
After all this you should be able to connect to the D87-Authenticated WiFi Network