Encyclopedias
World Book Encyclopedia - Get and overview here and more
Databases
Ebscohost - try a search in the Science Reference Center
Gale Database - Try a Power Search of the databases
Gale Virtual Reference Library (GVRL) - Select GVRL on the right hand column, then search our ebooks for information
Web Sites -
Brain Development in Childhood-the Dana guide - Sections include: brain a work in progress, plasticity and critical periods, from first words to first book, the first 3 years: myth or mandate?, encouragement and enrichment, bold or bashful?, what neurological impairments reveal, helping children explore the world, chart of expected visual development 
Zero to Three - Tons of information about growth and development - brain development, impact of neglect and abuse, social development, and more.  Check out the link to featured resources, as well.
PBS.org - Child Development  - Information for ages 1-4
MedlinePlus - Infant and Newborn Development.  Use "Search MedlinePlus" to access information about toddlers, nutrition, etc.  Refine your search by using the "Refine by Type" on the left side of the page.
CDC.gov - Information on a variety of topics on growth and development.
Mayo Clinic
Your Child's Health from Kids Health.org - covers everything from safety, emotions & behavior to medical problems and nutrition and fitness
Pew Research Center - Use search terms like:
                       divorce AND children
                       same sex m
OUR CATALOG - search under "child development"