The Khan Academy curriculum is viewable here: https://www.khanacademy.org/cs/programming.
Topics covered are: Basic statement syntax, Variables, Math operators and assignment operators, Strings, Functions, Logic and conditionals, Loops, Arrays, Objects, and Object-oriented JS.
The curriculum currently (September 2014) consists of 40 videos (talk-throughs), 31 challenges, and 9 projects. On average, the talk-throughs are 6 minutes long, the challenges take 5 minutes each to complete, and projects are often completed in 10-40 minutes, depending on how far the student wants to take them. There is thus around 15 hours of curriculum.