Mr yang is my history teacher.He is kind and always cares about us.Although our class grade isn't good ,he still treats us as same as past.He is knowledgeable because he understands whatever the project is.He works too hard to don't have enough sleep,but he is always energetic .He is stict about his work and his class is fun.We also like him.I hope he can keep healthy. Mr yang is my history teacher.He is kind and always cares about us.Although our class grade isn't good ,he still treats us as same as past.He is knowledgeable because he understands whatever the project is.He works too hard to don't have enough sleep,but he is always energetic .He is stict about his work and his class is fun.We also like him.I hope he can keep healthy.