All three, actually! I am most familiar with "I'm Yours", although I'm not smooth with the chord changes yet. I'd be up for practising any of them.

It is Kāʻili who is actually awesome. I used to play piano but I fell in love with 'ukulele 2 years ago and thought I was doing well as a self learner until I joined this place. Kāʻili helped me so much I feel like I've made months of progress in a few weeks. He is so patient and I feel I can ask him any question about 'ukulele and he goes out of his way to give in-depth answers, and with demostrations and video references. What more could a 'ukulele nerd want? Come to the hangouts!

Just had a watch of your videos in Ear Training and I think this is a great app and I love how it has different genres of music, and your method seems to be the exact same method I use. I wonder if listening, asking yourself "major or minor", then humming, then playing it on the instrument to match notes is the common way for us folks without "absolute pitch". I love that you show your chain of thought step by step when you use it. I can see it being a really valuable tool to use together with a student. In Punk#1 at 10:32 I thought it was B major since it started with the tonic triad of B. The most prominent note we can hear (F#), which you played down on top of the recording, my ears placed it as the 5th degree of the scale but it was actually the 1st (tonic) which can also work, just not my gut instinct, and you were correct according to the app. Sometimes when you entered an answer and it didn't agree I can see exactly why you picked that answer and I think just occasionally a clip may not give enough context and could therefore have more than one answer. So that is my only nitpick -- I would say that if the app doesn't agree with your answer, don't worry too much if your answer is in a related key. It's still a really useful training tool!

James R is right it's addictive!! I've been playing it for an hour... I can get most of them first or second try but Bossa Nova #1 got no idea! I have a lot to learn...