高二英语Unit20lesson3教案Teachingaims:TolearnaboutsomeScientificBreakthroughsandthescientistsTounderstandthetextandgetsenseofthescientificdevelopmentTolearnsomewordsandexpressionsTeachingdifficultpoints:TogetstudentsknowaboutthescientificbreakthroughsTeachingaid:Multi-mediumTeachingprocedures:Step1.WarmingupTask1:talksomethingaboutNewtonandhisdiscoveriesTask2:trytomatchthediscoveriesorinvention...