National Guard Specialist Austin Alt fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt holds open the classroom door as the next class arrives while he fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt takes attendance as he fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt assists a student as he fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt assists a student as he fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

Students go through a worksheet packet as National Guard Specialist Austin Alt (not pictured) fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt holds open the classroom door as the next class arrives while he fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt prepares more worksheet packets as he fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt holds open the classroom door as the next class arrives while he fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt stands as he fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt walks through the halls of Pojoaque Valley Middle School as fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences in Pojoaque, New Mexico, U.S., January 28, 2022.

National Guard Specialist Austin Alt takes attendance as he fills in as a substitute teacher due to staffing shortages caused by the coronavirus disease (COVID-19) pandemic and other non-illness related absences at Pojoaque Valley Middle School in Pojoaque, New Mexico, U.S., January 28, 2022.