any apartment offers short term (month by month) lease?

Hi everyone! I have a friend that are moving to Houston and in the process of buying a house, but with the housing market so hot, they aren't sure when they would be able to close the deal. They have school aged kids that need to go to School. They are hoping to find apartment that offers short term lease so that they can establish residency to enroll their kids to school. Any information would be appreciated!!