Criminal Law covers statutory and common law of crimes and defenses, the procedures by which the law makes judgments as to criminality of conduct, the purposes of the criminal law, and the constitutional limits upon it.
1L year is busy, and it is understandable if you do not have the time to read additional study materials. Luckily, Wolters Kluwer and West Academic have some great audio and video study aids you can listen to. Here are a couple of good resources:
Available on Westlaw (password required): here.