I'm an adult learner who started using Khan Academy to learn math and now physics after I retired in mid-2017. I hope to do more traveling now that I'm retired. I have a personal challenge to use Khan Academy in hotels in as many U.S. states as possible. Although hotel Wifi is sometimes sketchy, I have managed to use Khan Academy in hotels in 8 states so far. I'm listing them geographically from northeast to southwest, although this is not the sequence in which I have used Khan Academy in hotels (although the last one I'll be listing is the most recent one so far):

Maine

Massachusetts

New York

New Jersey

Pennsylvania (my home state, although I have traveled within this state in this time period)

Maryland

Virginia

Florida