Students respond negatively to the effort that good teachers require.

It's time to think outside the cube.

Just like his beloved grandfather, Avi Reichental is a maker of things. The difference is, now he can use 3D printers to make almost anything, out of almost any material. Reichental tours us through the possibilities of 3D printing, for everything from printed candy to highly custom sneakers.

Three big trends that could shape the future of high-tech manufacturing—and the middle class