Holmes reportedly wants to stay involved in her six-year-old daughter's life and fulfil the responsibility of a single mother, reported Contactmusic.
"Katie is embracing her new-found life as a member of the PTA.
She's getting involved in as many activities at the school as her schedule will allow. She's really thrown herself into being a single mom," a source said.
Holmes is raising Suri alone after she split from husband of five years Tom Cruise.