Terms to possibly use when researching your topic:
Suggested databases to try first.
Adoption - A practice in which an adult assumes the role of parent for a child who is not his or her biological offspring. Healthcentral.com
Foster Care - Placing a child in the temporary care of a family other than its own as the result of problems or challenges that are taking place within the birth family, or while critical elements of an adoption are being completed. Adoption.com
A few selected titles.
The library catalog includes streaming video material.