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Remote Ready Biology Learning Activities has 50 remote-ready activities, which work for either your classroom or remote teaching.
"Realism" and "Constructivism"
Are you sure you understand constructivism well enough to say that realism is distinguishable from it? The way you describe it, your distinction between realism and constructivism is distinction without a different. I hope you understand that constructivism forthrightly stands for the proposition that there is no such thing as logical content, that Einstein's "practical geometry" is constructivism, and that he uses constructivism as a technique in formulation of the relativity of simultaneity.
We are now in the postconstructivist era, in which attacks are mounting on all arguments which are constructivist in nature. Einstein has not been spared this analysis. But you don't seem to be aware of any of this. The main attack is coming from the new historiography of set theory.
You seem very ignorant of what is going on in the intellectual world. Wake up.
Ryskamp, John Henry,Paradox, Natural Mathematics, Relativity and Twentieth-Century Ideas(June 17, 2008). Available at SSRN: http://ssrn.com/abstract=897085