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有力幅度大。第四節(jié):正壓腿要求:雙手持球并端平,上體直立,重心落在支撐腿上,后腳蹬直,髖關(guān)節(jié) 向下運動。第五節(jié):側(cè)壓腿要求:雙手持球放于地面,上體直立,重心落在支撐腿上,運動腿要伸直。第六節(jié):踝關(guān)節(jié)與膝關(guān)節(jié)運動要求:雙手持球放于腦后,前兩個八拍雙腳并攏屈膝彈動,后兩個八拍雙腳 開立做踝關(guān)節(jié)繞環(huán)運動,動作有力幅度大。?、教學(xué)活動?集合整隊,成廣播體操隊形散開,全體學(xué)生面向教師,隊形如(圖2)。?教師講解示范(背面與鏡面示范),強調(diào)做好準備活動的重要性。?學(xué)生跟著教師口令一起,注意模范教師動作。?組織措施學(xué)生成四列橫隊廣播體操隊形散開,全體學(xué)生面向教師,隊形如(圖2)。? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?(圖2)?要求:動作應(yīng)舒展大方、協(xié)調(diào)有力,節(jié)奏感強。(二)學(xué)習(xí)提高部分(30分鐘)1(助跑摸高(5分鐘)動作要領(lǐng):自然擺臂助跑,步幅大有節(jié)奏感,動作有力有彈性,起跳時踏跳腿全腳掌著地,右腿屈膝上臺,重心向上提,手臂伸直。重點:起跳時,踏跳腿迅速踏跳發(fā)力,重心向上提,動作舒展,重心高,騰空時間長。難點:靈活運用在不同助跑速率的情況下增加騰空時間與踏跳高度。(1)教學(xué)活動?教師質(zhì)疑:跑步時,重心一直都是向前,怎么在起跳時重心向上提, ?學(xué)生討論、嘗試、練習(xí)。?教師邊講解邊示范動作,并強調(diào)動作重點與難點。隊形如(圖1)?學(xué)生分組練習(xí)(女同學(xué)一組,男同學(xué)一組,分別在籃球場的各半場,循環(huán)練習(xí))場地布置:如(圖3)。administrative leadership of the criticism, resulting in serious consequences, the pursuit of leadership, along with 5001000 punishment.(5)significant near miss should be attempted as the case of responsible for the accident and construction team injuries accident penalty provisions, mutatis , should perform in the construction standards and specifications, serial number a 1 GB33232005 steel fusion welded butt joints, welding engineeringRay lighting and quality rating of 2 GB1134589 steel welds manual methods of ultrasonic inspection and testing results for grade 3 GB502362002 industrial pipe welding engineering code for construction and acceptance of field equipment 4 HGJ22292 technical specification for welding of aluminium and its alloys 5 low temperature steel welding procedure 6 SH35252004 petrochemical JB/ T47082000 of welding procedure qualification for steel pressure vessels 7 JB/47092000 8 JB47302005 pressure vessel welding procedures of steel pressure vessel NDT 9 JB/T47442000 steel pressure vessel products mechanical properties test of welded plate II, mechanical equipment installation engineering 1 GB15098 2 GB501282005 vertical cylindrical steel pressure vessel steel welded tank code for construction and acceptance of 3 JB/ T47351997 steel welded atmospheric pressure vessel 4 GB502312009 mechanical equipment installation engineering construction and acceptance specification for 5 GB5027598 pressor, fan and pump installation engineering construction and acceptance specification for lifting 6(圖3)(25分鐘)動作方法:以右手投籃為例,右腳向前跨出時持球護球,接著迅速上左腳起跳,右腿屈膝上抬,同時舉球至頭右側(cè),騰空后,上體稍后仰,當(dāng)身體跳到最高點時,右手臂伸直,用手腕前屈和手指力量將球投出。動作要點:一跨大步接球牢,二跨小步用力跳,三要翻腕托球舉球高,四要指腕柔和用力巧。重點:行進間運球和三步單手肩上投籃兩動作的銜接。難點:跳起投籃時,騰空高度和控制身體的平衡及投籃出手動作連貫柔和。(1)教學(xué)活動? 教師講解示范,學(xué)生仔細觀察,提出動作的重點與難點。? 師生互動:在上籃時怎樣提高騰空高度,第二步步幅小以及右腿屈膝上 抬能幫助我們提高騰空高度。?學(xué)生原地做徒手的三步上籃練習(xí),教師對動作問題提出糾正。?學(xué)生討論,分組練習(xí),教師巡場指導(dǎo),針對個別問題個別糾正。組織措施:學(xué)生由原來的準備活動隊形如(圖1),前一二排向左轉(zhuǎn)帶入籃球場的一個半場,后兩排向右轉(zhuǎn)帶入籃球場的另外半場分組練習(xí)如(圖4),教師巡場指導(dǎo),組別間可以進行上籃成功率的比賽。(圖4)(三)恢復(fù)整理部分(5分鐘)1(教學(xué)內(nèi)容?整理運動放松:瑜伽放松練習(xí)。?講評:學(xué)生完成本次課的情況,以鼓勵為主,提高學(xué)生的自信心。?收拾整理器材2(教學(xué)活動方式與組織措施 ?教學(xué)活動 ?集合學(xué)生。?語言提示進行腰部、腿部放松練習(xí),及調(diào)整呼吸放松。?小結(jié)本次課的情況。?安排值日生收拾器材。administrative leadership of the criticism, resulting in serious consequences, the pursuit of leadership, along with 5001000 punishment.(5)significant near miss should be attempted as the case of responsible for the accident and construction team injuries accident penalty provisions, mutatis , should perform in the construction standards and specifications, serial number a 1 GB33232005 steel fusion welded butt joints, welding engineeringRay lighting and quality rating of 2 GB1134589 steel welds manual methods of ultrasonic inspection and testing results for grade 3 GB502362002 industrial pipe welding engineering code for construction and acceptance of field equipment 4 HGJ22292 technical specification for welding of aluminium and its alloys 5 low temperature steel welding procedure 6 SH35252004 petrochemical JB/ T47082000 of welding procedure qualification for steel pressure vessels 7 JB/47092000 8 JB47302005 pressure vessel welding procedures of steel pressure vessel NDT 9 JB/T47442000 steel pressure vessel products mechanical properties test of welded plate II, mechanical equipment installation engineering 1 GB15098 2 GB501282005 vertical cylindrical steel pressure vessel steel welded tank code for construction and acceptance of 3 JB/ T47351997 steel welded atmospheric pressure vessel 4 GB502312009 mechanical equipment installation engineering construction and acceptance specification for 5 GB5027598 pressor, fan and pump installation engineering construction and acceptance specification for lifting 6 ?師生再見。?組織措施:學(xué)生成四列橫隊廣播體操散開,全體學(xué)生面向教師,隊形如(圖2)。?要求:動作舒緩進行。?教師總結(jié)本節(jié)課教學(xué),并布置課外作業(yè)。七、教學(xué)中可能出現(xiàn)的問題及解決預(yù)防方法: 1(可能出現(xiàn)的問題:(1)上籃步數(shù)不清楚,腳下動作不協(xié)調(diào)。(2)騰空高度不夠,右腿不能快速上抬。(3)騰空投籃時,動作僵硬不協(xié)調(diào),雙手拋球,手臂伸不直。(4)個別學(xué)生運球時球的落點不對,或太前或太后,導(dǎo)致起步不順。預(yù)防方法:(1)徒手腳步練習(xí)站定,左腳在前,右腳在后,適當(dāng)屈膝,雙手做持球狀。自喊口令“一、二、投”,同時做出右腳、左腳連續(xù)向前跨兩步后投籃的動作。(2)讓學(xué)生扶墻或欄桿,快速屈膝抬右腿,放下,落地后重復(fù)數(shù)次,注意練習(xí)時的彈性和節(jié)奏感,這樣既能增強下肢力量又能提高學(xué)生的動作質(zhì)量。(3)做原地單手投籃練習(xí):站在籃圈右下方,雙手持球,兩腿為屈跳起后,在重心達到最高點處,開始由右手托球的下方,伸臂撥腕,可以將球直接投入籃筐,或打板進筐,逐人練習(xí),讓每個學(xué)生都體會單手肩上投籃的感覺。(4)對于運球基本功不過關(guān)的學(xué)生先進性運球的行進間練習(xí),再過渡到運球的行進間上籃練習(xí)。八、場地器材:場地:籃球場 器材:跳高架2個、橡皮筋末端系一小球2個、籃球若干(根據(jù)學(xué)生人數(shù)而定)、秒表一個、紙筆。九、效果預(yù)計: 1(預(yù)計70%以上學(xué)生能初步掌握本課所學(xué)的行進間單手肩上投籃技術(shù)。2(預(yù)計本課學(xué)生的運動強度為中等,最高心率165次/分左右,平均心率130次/分左右,練習(xí)密度為60%左右。測量心率方法:隨機抽3至5個學(xué)生進行心率測試,開始熱身部分測安靜時的心率,準備活動熱身結(jié)束時測熱身心率,學(xué)習(xí)提高部分學(xué)生進行游戲比賽時測最高心率,整理恢復(fù)部分做完完全放松整理運