Taking Sarah for Her License

My 17 year old niece needed her license, her father isn't around, and my dad is 84... so again, the role of father fell into my lap. At my mother's instruction, I included her sister who is 13, and we headed out. Since I took my test nearly 24 years ago, I didn't know that once you have a permit, you don't need to take the written part of the test again... and apparently, neither did Sarah. Oh, and we didn't know you can take it and fail, no more that twice a day. This saga lasted more than one day...