1/ Outdoor education. This time of year and for the next two months many schools have an opportunity to have some class periods outdoors (weather, space, and local conditions permitting). Do it if you can.
2/ A very nice whiteboard on wheels costs roughly the same as an XLNT HEPA filtration system on wheels, about 2 Grande Frappuccinos per student per yr for a class of 25 students. An investment of $10/student for each is small given$15K cost of educating 1 student/yr in US.
3/ I used to occasionally teach outdoors as a faculty member at the U of Texas at Austin on nice fall and spring days. Students would bring towels to sit on. It was a wonderful way to teach, and the students seemed to like it as well.
4/ Anything that can be done outdoors when and where appropriate (still wear masks as an extra precaution, especially if students are close together). Outdoors = much greater dilution of aerosol particles and dispersion between infector & receptor. Just do it!
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