【文章內(nèi)容簡(jiǎn)介】 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(yùn)動(dòng)。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(yùn)動(dòng)腿要伸直。第六節(jié):踝關(guān)節(jié)與膝關(guān)節(jié)運(yùn)動(dòng)要求:雙手持球放于腦后，前兩個(gè)八拍雙腳并攏屈膝彈動(dòng)，后兩個(gè)八拍雙腳 開立做踝關(guān)節(jié)繞環(huán)運(yùn)動(dòng)，動(dòng)作有力幅度大。?、教學(xué)活動(dòng)?集合整隊(duì)，成廣播體操隊(duì)形散開，全體學(xué)生面向教師，隊(duì)形如(圖2)。?教師講解示范(背面與鏡面示范)，強(qiáng)調(diào)做好準(zhǔn)備活動(dòng)的重要性。?學(xué)生跟著教師口令一起，注意模范教師動(dòng)作。?組織措施學(xué)生成四列橫隊(duì)廣播體操隊(duì)形散開，全體學(xué)生面向教師，隊(duì)形如(圖2)。? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?(圖2)?要求:動(dòng)作應(yīng)舒展大方、協(xié)調(diào)有力，節(jié)奏感強(qiáng)。(二)學(xué)習(xí)提高部分(30分鐘)1(助跑摸高(5分鐘)動(dòng)作要領(lǐng):自然擺臂助跑，步幅大有節(jié)奏感，動(dòng)作有力有彈性，起跳時(shí)踏跳腿全腳掌著地，右腿屈膝上臺(tái)，重心向上提，手臂伸直。重點(diǎn):起跳時(shí)，踏跳腿迅速踏跳發(fā)力，重心向上提，動(dòng)作舒展，重心高，騰空時(shí)間長(zhǎng)。難點(diǎn):靈活運(yùn)用在不同助跑速率的情況下增加騰空時(shí)間與踏跳高度。(1)教學(xué)活動(dòng)?教師質(zhì)疑:跑步時(shí)，重心一直都是向前，怎么在起跳時(shí)重心向上提, ?學(xué)生討論、嘗試、練習(xí)。?教師邊講解邊示范動(dòng)作，并強(qiáng)調(diào)動(dòng)作重點(diǎn)與難點(diǎn)。隊(duì)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(chǎng)的各半場(chǎng)，循環(huán)練習(xí))場(chǎng)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(dòng)作方法:以右手投籃為例，右腳向前跨出時(shí)持球護(hù)球，接著迅速上左腳起跳，右腿屈膝上抬，同時(shí)舉球至頭右側(cè)，騰空后，上體稍后仰，當(dāng)身體跳到最高點(diǎn)時(shí)，右手臂伸直，用手腕前屈和手指力量將球投出。動(dòng)作要點(diǎn):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(diǎn):行進(jìn)間運(yùn)球和三步單手肩上投籃兩動(dòng)作的銜接。難點(diǎn):跳起投籃時(shí)，騰空高度和控制身體的平衡及投籃出手動(dòng)作連貫柔和。(1)教學(xué)活動(dòng)? 教師講解示范，學(xué)生仔細(xì)觀察，提出動(dòng)作的重點(diǎn)與難點(diǎn)。? 師生互動(dòng):在上籃時(shí)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(duì)動(dòng)作問題提出糾正。?學(xué)生討論，分組練習(xí)，教師巡場(chǎng)指導(dǎo)，針對(duì)個(gè)別問題個(gè)別糾正。組織措施:學(xué)生由原來的準(zhǔn)備活動(dòng)隊(duì)形如(圖1)，前一二排向左轉(zhuǎn)帶入籃球場(chǎng)的一個(gè)半場(chǎng)，后兩排向右轉(zhuǎn)帶入籃球場(chǎng)的另外半場(chǎng)分組練習(xí)如(圖4)，教師巡場(chǎng)指導(dǎo)，組別間可以進(jìn)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(yùn)動(dòng)放松:瑜伽放松練習(xí)。?講評(píng):學(xué)生完成本次課的情況，以鼓勵(lì)為主，提高學(xué)生的自信心。?收拾整理器材2(教學(xué)活動(dòng)方式與組織措施 ?教學(xué)活動(dòng) ?集合學(xué)生。?語(yǔ)言提示進(jìn)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(duì)廣播體操散開，全體學(xué)生面向教師，隊(duì)形如(圖2)。?要求:動(dòng)作舒緩進(jìn)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(dòng)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(shí)，動(dòng)作僵硬不協(xié)調(diào)，雙手拋球，手臂伸不直。(4)個(gè)別學(xué)生運(yùn)球時(shí)球的落點(diǎn)不對(duì)，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(shí)做出右腳、左腳連續(xù)向前跨兩步后投籃的動(dòng)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(shí)的彈性和節(jié)奏感，這樣既能增強(qiáng)下肢力量又能提高學(xué)生的動(dòng)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(dá)到最高點(diǎn)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(jìn)筐，逐人練習(xí)，讓每個(gè)學(xué)生都體會(huì)單手肩上投籃的感覺。(4)對(duì)于運(yùn)球基本功不過關(guān)的學(xué)生先進(jìn)性運(yùn)球的行進(jìn)間練習(xí)，再過渡到運(yùn)球的行進(jìn)間上籃練習(xí)。八、場(chǎng)地器材:場(chǎng)地:籃球場(chǎng) 器材:跳高架2個(gè)、橡皮筋末端系一小球2個(gè)、籃球若干(根據(jù)學(xué)生人數(shù)而定)、秒表一個(gè)、紙筆。九、效果預(yù)計(jì): 1(預(yù)計(jì)70%以上學(xué)生能初步掌握本課所學(xué)的行進(jìn)間單手肩上投籃技術(shù)。2(預(yù)計(jì)本課學(xué)生的運(yùn)動(dòng)強(qiáng)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(cè)量心率方法:隨機(jī)抽3至5個(gè)學(xué)生進(jìn)行心率測(cè)試，開始熱身部分測(cè)安靜時(shí)的心率，準(zhǔn)備活動(dòng)熱身結(jié)束時(shí)測(cè)熱身心率，學(xué)習(xí)提高部分學(xué)生進(jìn)行游戲比賽時(shí)測(cè)最高心率，整理恢復(fù)部分做完完全放松整理運(yùn)