I found this on Pinterest and thought it might be useful for some of us.
Noisli is a white noise generator. It comes stocked with 8 preset sounds that you can use one at a time or a combination of 2 or more and adjust the level of each one.
Right now I have a train and a thunderstorm playing and I am slipping right into a state slightly higher than being sound asleep.
Check it out, you make like it and your classes will love it.
Leave a comment or suggest a website of your own.
Where is the link?