Free K-12 Text BooksFree K-12 Text Books
The CK12 project is developing free (CC by SA) textbooks for the K-12 market (with a current focus on the early years of high school) [1]. Their primary aim seems[...]
Day: August 29, 2009
Increasing Productivity through Clean AirIncreasing Productivity through Clean Air
Kamal Meattle gave an interesting TED talk about using plants to produce enough oxygen to support people in sealed buildings [1]. The combination he advocates is Areca Palm for the[...]