Using the learning community technology , the author constructed a learning model of thematic learning community on internet among middle schools . then choosing several complex concepts - air temperature , light shadow , light pollution from middle school physics book as learning topic , the author carried out two turns of action research in several middle school class in different areas 本研究以初中物理為實(shí)踐學(xué)科,選取了“氣溫” 、 “光影” 、 “光污染”等幾個(gè)復(fù)雜概念作為學(xué)習(xí)主題,以行動(dòng)研究的方式,在不同地區(qū)的幾所8年級(jí)中學(xué)生中開展了為期8個(gè)月的兩輪應(yīng)用研究。