Microns and Masks
Algebra Number Sense Science Social Studies Current events Ratio and Proportion
  How big is one coronavirus? How big is a micron? How well do these masks protect against the virus? What can you observe about the size of particles mentioned? Why are we wearing masks?
5.NBT 4.MD 5.MD 6.RP 6th 7th 8th HS 5th 4th 4.NBT relative sizes Coronavirus micron nanomicron