1. search the knowledge tools. More about what we want to teach, such as finding from the online world, because it will allow us to keep the world. A well read books because knowledge makes us stop to study.
1. Search engines know more about what we want to teach. As for the online world will enable us to keep pace with the world. The book does not stop because knowledge leads us to study.
1. Search tools, more knowledge about what we want to teach. Such a finding from the online world, because will make us to take advantage of. And because we can't stop reading knowledge to study.