I loved my human development classes. I took it twice, basically. First time I used Development Through the Lifespan by Laura Berk. The second time I used Human Development: A Lifespan View By Robert V. Kail and John C. Cavanaugh.
I found the course extremely fascinating and absolutely believe that it is the foundation of my practice in healthcare. Don't think of it as a "psych class". I loved Erickson's theories, Maslow, theories on moral development.
While you could probably pass the class without ever cracking open a book, you should definitely do the reading assignments. Also consider that most of the mainstream nursing theories are based on or similar to the theories you will find in your lifespan development class.
In the past, most human development classes overly focused on fetal, infant and child development. That is nice if you are going to be a childhood educator or pediatric nurse, but don't let the course sell you short on the rich human development that occurs across the lifespan. Even little old ladies are still developing and undergoing growth.