Does a foster care student have to be currently in foster care to be eligible for Pre-K?

No.

Students who are in or who have ever been in the conservatorship of the Texas Department of Family and Protective Services (DFPS) (i.e., in foster care) following an adversary hearing are eligible for free Pre-K. These students include not only students who are in or who have ever been in DFPS conservatorship but also students who have been adopted or returned to their parents after having been in DFPS conservatorship.