The answer for this question is: <span>Previous teaching experience
Experienced teachers tend to have a larger spectrum of knowledge about the subject that they expert in.
Not only that, they also have developed a certain people skill that make them able to transform the knowledge to students more efficiently compared to inexperienced teachers</span>
When they came here to america, they bedded job opportunities, and new land.
Mr. White finds the monkey's paw and wishes his last wish. The knocking immediately ceases.
Hope this is what you're looking for. Have a great day! :D