Consider the following five criteria:
1. Accuracy - Is the information correct?
2. Authority - What are the author's credentials?
3. Coverage - Is the content covered comprehensively?
4. Currency - Is the information current?
5. Purpose - Is the content biased?
If you're not certain, ask a librarian!
There are many web sites devoted to child development and early childhood education. Listed here are a small number of high-quality sites that contain links to additional sites.