The Student asks me for the School code to connect to the App, where do I find it?

The user is getting the procedure wrong.
When opening the App, when presented with two options, he should choose "Yes, I recently received a text message" to continue to the App link and NOT the other option "No, not received any text messages"

The School's code is not for already enrolled students but is for promotional purposes of its products aimed at all those who are NOT enrolled in the school.

Full App Registration Guide here.