She doesn't need to create multiple layouts for every screen size. In fact, it's entirely possible to only use one layout for every screen size. You just need to remember not to use pixel measurements, but instead using device independant pixels (dip or dp). Also, Android's dynamic layouts are very powerful if used correctly, so things can be placed and sized in a manner that looks the same on every device.
My blog, Inverted Keystrokes
, is looking for aspiring developers (not necessarily with Android) to post articles. If you have any development experience and are interested in participating, please PM me. =)