劍橋詞典in the US, a system for educating young children in which classes and activities are informal and changed to suit each child （美國的）開放式課堂，大課堂（指開展不拘形式、富於變化的課程或活動(dòng)以適應(yīng)每個(gè)學(xué)生的教育制度） 返回 open classroom