Managers are responsible for setting workplace policies under which teachers can succeed. Managers are responsible for negotiating contracts that create the conditions under which teachers can succeed.

How absurd that our students tuck their cell phones, BlackBerrys, iPads, and iPods into their backpacks when they enter a classroom and pull out a tattered textbook.

I learned to embrace risk, as long as it was well thought out and, in a worst-case scenario, I'd still land on my feet.

I don't think it makes any sense for an individual to invest in common stocks unless they know the company, work at the company, and so on.

A lot of executives act like their time is worth more than anyone else's. But I always respect an employee who guards his or her time, even from me.

Oprah Winfrey's global influence is unparalleled. Not only has her generosity and firm belief that education is the key to a better life benefited countless women and children around the world, but her example has also inspired millions of people to give back in ways big and small.

I can imagine no more important contribution to our country's future than a long-term commitment to improving urban K-12 public schools.