Here’s an useful resource from Middlebury College, the Asynchronous Cookbook “recipes for engaged & active online learning”
Whether you’re teaching mostly in person but looking for some regular, asynchronous activities to add to your course, or teaching a fully online course, this resource is for you. The activities in this cookbook draw on research and good practice in online course design to provide recipes - concise and specific instructions and examples - for adding asynchronous activities to a course. Meaningful interaction between students and instructors is a key ingredient in all of these recipes. You can download a PDF of the book, if desired, to reference it offline.
It is published under a Creative Commons Attribution NonCommercial ShareAlike license.