Teachers at American colleges and universities have many different teaching methods．Some teachers give homework and check homework every day, and students in their classes have to take many exams．Some teachers give only writing tasks．Some teachers always follow a course outline and usually use the textbook．Others send students to the library for tasks．

　　The atmosphere(\^)in some classrooms is very formal．Students call their teachers Professor(教授)Smith, Mrs．Jones and so on．Some teachers wear business clothes and give talks．Other classrooms have an informal(非正式的)atmosphere．Students and teachers discuss their ideas．Teachers dress informally, and students call them by their first names．American teachers are different in their teaching styles．

　　At most American colleges and universities, libraries and learning centers can be used by students at any time．They can often use tape recorders, video machines and computers．They can buy books, notebooks and other things at campus stores．There are also services(服务)to students．They can get advice on their problems from their teachers．Colleges and universities usually offer facilities(设施)to students．Some schools have swimming pools and tennis courts．Most have fast food restaurants．

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　　Two children stood outside the door with old coats．"Any old papers, Lady? " asked one of them．

　　I was busy．I wanted to say no, but I saw that their shoes were broken and wet．"Come in and I'll make you a cup of hot tea．" They came in saying nothing．Their shoes left snow on the floor．

　　I gave them tea and bread to protect them against the cold outside．Then I went back to the kitchen and started my housework again．

　　The silence in the front room surprised me．I looked in．

　　The girl held the empty cup in her hands, looking at it．The boy asked me in a low voice, "Lady…are you rich? "

　　"Am I rich? Oh, no! " I looked at my old things in the room．

　　The girl put her cup back in its saucer(茶碟)carefully．"Your cups match your saucers．"

　　They left then, holding their papers against the wind．They hadn't said thank you．They didn't need to．They had done more than that．The blue cups and saucers were simple．But they said that they matched．The potatoes and meat before me, a roof over our heads, my husband with a job-these things matched, too．

　　I moved the chairs back from the fire and cleaned the living room．The prints of their small shoes were still wet upon my floor．I let them be．I wanted them there to remind me how rich I was．

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