The free version offers 3 Padlets, and all of the features are now available to teachers. However, for those that already have other Padlets in use, they can still use those as well. Also, my understanding is you can create a Padlet, use it, delete it, and then still have space available (hope you followed all of that). The paid version ($8.25 a month) offers everything you get out of the free version. However, you get an unlimited amount of Padlets.