Daniel Tkach: Modeling the Enterprise with Object, Processes, and Rules -- Outstanding Master's Thesis Award 1997
David Fuhs: Lindenmayer Systems -- Outstanding Master's Thesis Award 1998.
Lonnie Heinke: Structured Matcher: A Case Study in Object-Oriented Redesign -- Outstanding Master's Project Award 2000.
Jerry Loyd: Fourier Series Tutorial -- Outstanding Master's Project Award 2002.
The hard part is that one needs to write this keeping in mind that the reader may not have much knowledge in the area. The trick is to write a clear description that shows the importance of the work but does not baffle, or lose the interest of, readers who do not have previous knowledge of the topic. Often the researcher is so very familiar with the topic that they forget that the rest of the world has not been thinking of only this topic for the past 6 months. One needs to excite the reader and make them want to read the document. This is sometimes hard, but when done well, is beautiful to read.
Do not make grandiose claims. As Einstein once said, "Everything should be as simple as possible, and no simpler." Don't make the reader have to "work" to enjoy reading the thesis. As my advisor said to me, "Be kind to your reader". This means it should not give someone a headache to read the work - trying to figure out what you are saying. Information should be pertinent and organized so that reading the document is enjoyable.