And they are free. "Introduction to Trigonometry is where I teach people about the trig functions."

VOA: standard.2010.03.26

Also in Kenya, a video game is being tested as another way to teach young people to avoid H.I.V.

VOA: special.2009.03.16

"It helped teach me how to count and read. And I also loved how they integrated the human characters with the Muppet characters.

VOA: special.2009.11.27

"I was raised on a small farm in southern Indiana and Dad tried to teach me and my brothers that you should never try to be better than someone else.

VOA: special.2010.06.10

I had to teach her to obey.

VOA: special.2009.11.08

"And he said I will teach girls, you're a traveler,not a tourist and approach your trip as a young child might approach a mud puddle.

VOA: standard.2010.06.19

This is a broken society, it is a fragile society, so I think you have to live for the future, commit for the future, teach for the future."

VOA: standard.2010.04.19

"God knows that I love to teach." "I love kids.

VOA: standard.2010.08.11

"I was raised on a small farm in southern Indiana and Dad tried to teach me and my brothers that you should never try to be better than someone else, always learn from others and never cease trying to be the best you could be, that is under your control."

VOA: standard.2010.06.05