Those Sudoku number grids that look so easy but can be so exasperating—wouldn’t it be great to write a program that can solve every one of them?

Imagine you’re a magician, and your neat trick is to read the minds of the people in the audience. They’ve seen some cards pulled from a deck. You boast that you can read their minds and pick the fifth card, which is amazing, because you’ve already missed the first four! How can you pull this trick off?

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• 6.S095 Programming for the Puzzled

By Joe Pickett, OCW Publication Director

Good, good, good, good vibrations . . . are not just fundamental to love, but to the structure of the universe itself.

In fact, “without waves and vibrations, we would not be able to even recognize this universe,” says Professor Yen-Jie Lee, in his introductory video to Physics III: 8.03SC Vibrations and Waves, a course just published on OCW. Think about it: light, sound, brain activity, and even gravitation all involve vibrations and waves. These phenomena are everywhere. To understand them is to understand the universe.

Part of the MITx commitment to open learning is focused on making MOOCs accessible to learners with disabilities. MITx learner Aditi Shah is a young woman in India with goals to create the next generation of cyber security tools. She’s also blind.

Aditi was able to independently complete our set of introductory computer science courses. She could do this without sighted assistance because MITx considers how a blind person accesses and demonstrates mastery of a subject. Now she’s moving on to a Master’s degree program and advancing in her career.
 
> Read her inspiring story