Piano lessons

Every Monday night, I teach piano lessons to two kids from church. Every week, I wonder how I even got into it and also wonder how long it will go on. Don't get me wrong, the kids are awesome, I'm just a horrible teacher and i don't think i know what I'm doing. Anyway, today Evan decided that his worst enemy was F...one of the piano keys/music notes. He refused to play all of the Fs in his songs. Oh dear. Then, I discovered that Emma didn't know her notes at all so I had to be the mean teacher and quiz her and tell her that if she didn't know the notes, she shouldn't play. Dang...I'm so horrible :(