Designing your Windows 8 app to be the best in its category

In partnership with Joel Martinez, the creator of the Windows Phone Khan Academy app (4/5 stars with 100+ ratings, Top 10 most popular app in Education category), we have finished a step-by-step video-series that shows how to migrate a popular, real-world Windows Phone app to the Windows Store.
Khan Academy is a not-for-profit company whose mission is to change education for the better by providing a free world-class education to anyone anywhere. Khan Academy has over 5,000 videos (150MM+ views) on everything from Calculus to Communism and everything in-between. Note, both the Windows Phone and Windows Store Khan Academy apps are 3rd party Khan Academy apps and are not officially endorsed by Khan Academy.
The five part series is available here
The full source code is also available for both apps to help developers learn how to migrate their apps.