Teaching at a school for military families can be especially demanding.
Students have to adjust to a new school every few years as their parents move and teachers have to adjust to students moving in and out.
At Randolph Elementary at the Randolph Field Independent School District, teachers embrace the challenge.
Keri Robertson always knew she wanted to be a teacher.
"I never considered anything else," she said.
But it was in her third year teaching when she went to Japan that she discovered her love for teaching the children of military families.
"Service was always very, very important in my family. My brother is in the military and while I knew that wasn't the career path for me, I wanted to do something to serve military families," said Robertson.
"It's been a calling for me to work with their children and make sure they're getting everything they need. Changing schools is hard for children and when one of their parents is deployed school becomes the one constant in their life. We try to be their constant.," explained Robertson.
At a military school teachers focus on the academic needs of students as well as their emotional needs.
"Seeing children through a parent's deployment is tough, but how wonderful it is to celebrate their mom or dad's homecoming," explains Robertson.
She teaches her second graders by constantly asking questions.
"When you ask questions, the students have to explain their answers and that challenges them to learn and achieve at the very highest levels.
Each one of them is pushed and stretched as far as they can in my classroom
"The highest level of understanding is to be able to explain your thinking to someone else," said Robertson.