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Remote Ready Biology Learning Activities has 50 remote-ready activities, which work for either your classroom or remote teaching.
Scale-free networks
A lot of people have mentioned doing a project with some aspect of scale-free networks and I'm thinking of going this way, too. I'm not sure exactly how but a good first step might be to write a program that creates a network of nodes and links based on growth, preferential attachment, and fitness. Then I could toy around with it some and see what else I want to do. I'm not sure.