Articulation

According to this website, it is normal for children to make some articulation errors. Although this is not a very long, detailed website it addresses main points concerning articulation disorders. It even gives Helpful Articulation Links, including Articulation Norms, Phonolgical Processes, Articulation Practice, and more Articulation Links. They provide additional information that the main website did not provide and practice sheets for various speech sounds a child might be working on in their speech.
http://hg016.k12.sd.us/articulation.htm