Is it possible to prevent a choice from being listed if it’s already been selected in a previous form?
Students need to choose 1/6 planes, 1/3 instructors, and a date/time that hasn’t been selected yet.
I’m wondering if this is possible via sheets + glide in any way…
Look at the booking example in https://concepts.glideapp.io/. Sound very similar to what you want.
YES! Perfect example and thank you so much for sharing that link!
I can add in the planes easy enough but for a student that wants to book a 8am time for 2 hours of flight time, is there a clever way to automatically book both 9am and 10am using the same variables without having to submit 3 total forms?
Wondering if it would work better having the student choose an hour duration or an end time. I just need the button to remain “Unavailable” if someone tries to book a time during another booking’s duration.
I’ll keep thinking 
Take a look at my booking app…it does what you’re asking:
Yes exactly!!! How are you handling the duration?