Note: These may require Acrobat Reader, available free from Adobe.
The Ten Commandments of Bible Interpretation by Pastor Kovaciny, ELS missionary in Ukraine. (HTML. Click here for a 165K PDF version.)
Luther's Small Catechism. This is in a format that you may find helpful when memorizing on your own.
Martin Luther's Large Catechism
The following links are also good to read. They are not necessarily written by confessional Lutherans, so as always you should be cautious about believing everything they say or imply.