Terms

Arhat: Means worthy one and refers to a saint
Nirvana: Process of escaping reincarnation.  This is the goal of Buddhists
Sangha: Buddhist monks
Sammatta: Intense meditation that brings enlightenment
Bodhisattva: One who has reached englightenment
Mahayana Buddhism terms 
Koan: Zen riddles that requires meditation
Zen Buddhism: An outgrowth religion of Mahayana that originated in Japan. It puts an emphasis on meditation
Modos: Stories in Zen Buddhism
Tendai: A Japanese school for Mahayana Buddhism 
Pure land Buddhism: An outgrowth religion of Mahayana. It is a popular form of Buddhism in East Asia. Buddha is not as important.

This is a picture of the Indian caste system. The caste system is essential in Hinduism, and one must acknowledge this in order to be considered a Hindu. This caste system however are rejected by other religions in India such as Jainism and Buddhims. To begin with there is the Brahmin. Brahmins are at the top of the caste system and they are usually scholars and priests. Their skin tone is the lighest. The second is the Kshaitria who are politicians or warriors. The third class are the vaish and they are merchants or practice somekind of skill. The bottom class are the shudra. As you can see in the picture, they are servants of the higher class people and laborers.

Bob therman

Tibetan Buddhism and Theravada Buddhism have several similarities as well as differences. To begin with both religions are similar in that they believe in a life of simplicity and asceticism. Moreover they believe in Buddha and his teachings and also in monks also called sangha. On the other hand Tibetan Buddhism is much more compassionate to others. Though both religion teach that we should be generous and help others, Tibetan buddhism goes to the next level and say that helping others would make your pains seem boring. Secondly the locations where they are practiced are different. Theravada exist in Sri Lanka, Thailand and Cambodia whereas Tibetan Buddhism exist only in Tibet. Thirdly Theravada is more focused on discipline than Tibetan or Mahayana Buddhism