But–as many readers have requested–they will all be available in their entirety over the next weeks in this column.

Here’s Part 2 of 4 of an interview Walt Mossberg did with the Gates Foundation’s Melinda Gates.

(I will be posting one video part of the discussion with Melinda Gates every day this week through Thursday.)

As you will see, Melinda Gates is articulate in ways that are critical to the task that she and her husband–that would be Microsoft (MSFT) Founder Bill Gates–have put before themselves: Big league philanthropy with deeply effective results, specifically in health and learning.

In this video, Melinda Gates talks about how the massive foundation focuses its efforts, its vaccine programs, her and her husband’s increased involvement and the broken public high school educational system in the U.S.

But–as many readers have requested–they will all be available in their entirety over the next weeks in this column.

Here’s Part 1 of 4 of an interview Walt Mossberg did with the Gates Foundation’s Melinda Gates.

(I will be posting one video part of the discussion with Melinda Gates every day this week through Thursday.)

As you will see, Melinda Gates is articulate in ways that are critical to the task that she and her husband–that would be Microsoft (MSFT) Founder Bill Gates–have put before themselves: Big league philanthropy with deeply effective results, specifically in health and learning.

In this video, Melinda Gates talks about her early days as a Microsoft product manager, how to take technology to the developing world, the politics of vaccines and how the Gates Foundation can be a “catalytic” wedge.