Yeah, that's a pick-me-up for sure. Your work is so important and so underappreciated. The thank you notes are treasures.
In case you haven't seen it, you'll enjoy slam poet Taylor Mali's tribute to teachers (he taught 8th graders in NYC for years) will make your day. https://www.bing.com/videos/search?q=what+teachers+make+mali&view=detail&mid=B91AE9CFDA261E5150D2B91AE9CFDA261E5150D2&FORM=VIRE0&ru=%2fsearch%3fq%3dwhat%2bteachers%2bmake%2bmali%26cvid%3d053afd9a6a4849859a5c5ff8a33b56b2%26pglt%3d43%26FORM%3dANNTA1%26PC%3dDCTS