Online teacher professional development: A learning architecture.Duffy, T.M.⋅Kirkley, J.⋅Del Valle, R.⋅Malopinsky, L.V.⋅Scholten, C.⋅Neely, G.⋅Wise, A. and J.Y., Chang.In Online professional development for teachers. Cambridge, Mass: Harvard Education Press. 2006. | Book Chapter