•Ned Wright, cosmologist at UCLA has a great set of websites, that in particular includes a cosmology calculator: http://www.astro.ucla.edu/~wright/cosmolog.htm •Wayne Hu has more tutorial webpages aimed at several levels: http://background.uchicago.edu/~whu/ •The David Hogg pedagogical papers I like very much are available at: on the K-correction -- http://xxx.lanl.gov/abs/astro-ph/0210394 and on the distances in cosmology -- http://xxx.lanl.gov/abs/astro-ph/9905116