I have found the following resources excellent for learning Tamil. I present them here since I believe they are very beneficial, and thus deserving special distinction. For learning Tamil, truly good resources are hard to come by.
I must stress that all of the comments in this page are my personal opinions, and that not everyone will necessary agree with those opinions. In other words, use your own judgement in reading this page and following up any of these resources.
The stories are arranged in order of increasing difficulty, with footnotes and a glossary covering all new words. The lessons require a mastery of the basic set of Thamil grammar (lessons in Parts 1-3 on this website).