Kate wondered how to help kids understand irrational numbers. After some awesome conversation in the comments, she put together a sequence that looks really promising.
JNewman85 had a tough time with a decibels application, but he was able to try again with much greater success.
Nik made a list of items to work on in his classroom and has shared an update on each item- improvement all around.
At the very least we have a solid concept here. Keep sharing your fails so we can follow up with success stories!