10% of each MPS school will be tested for COVID-19 every other week Starting this week, Milwaukee Public Schools will begin testing students and staff for COVID-19. MILWAUKEE - Starting this week, Milwaukee Public Schools will begin testing students and staff for COVID-19. This comes as children in grades 4 to 8 return to schools on Monday, April 19. Ten percent of each school will be randomly tested for COVID-19 every other week. Students will self-administer the nasal swab test. MPS said pool testing works as follows: Each child is given something like a Q-tip to swab their own nose Up to 25 of those Q-tips are put into a tube