青岛版小学科学四年级上册《瓶“吞”鸡蛋的秘密》教学反思.doc

青岛版小学科学四年级上册瓶“吞”鸡蛋的秘密教学反思瓶吞鸡蛋的秘密教学反思瓶吞鸡蛋的秘密教学反思  课后反思：课的开始通过“瓶吞鸡蛋”的魔术表演创设一种探究情境，吸引学生的注意力，激发学生的探究欲望，为整节课的探究学习活动奠定了良好的心理准备。 认识到大气压力的存在是本课的教学重点和难点，我分三个步骤进行递进式教学，引导学生切实经历了科学探究的过程：1、以吸盘为例，引导学生初步到“认识”大 气压力的存在。2、进一步“感受”大气压力的存在，认识到大气压力不仅存在而且大得惊人。一是直接经验，用手拉吸盘。二是间接经验，关于马德堡半球实 验。3、在前两个步骤的基础上自己选择实验器材设计实验方案，“验证”大气压力的存在，并认识大气压力的方向来自四面八方。 结束部分，让学生用所学的知识解释“瓶吞鸡蛋”的魔术表演，既检验了学习效果，又验证了课前的猜测，首尾照应。在此基础上，把实验进行拓展：怎么把瓶子里的鸡蛋弄出来，既激发了学生解决问题的欲望，又能让学生学以致用，一举两得。 通过本节的教学实践，我深深地感受到，只要我们精心设计教学方案，充分激发学生兴趣，关注动态生成，调动丰富情感，就能唤起学生沉睡的潜能，激活封存的思维，开启幽闭的心智，放飞囚禁的情愫，从而走进探究的海洋，放飞科学的梦想！在教学过程，我发现还是学生都能够积极的参与的实验活动中去，都能够积极地动手去操作。 但是学生的听课情况，和教室里有很大的不同。在实验室中，学生是按照实验小组坐着一起，他们面对面或者紧挨着，或者是背对着老师，这样的小组安排有利于学 生进行实验操作和交流，当然这样安排的目的就是使学生能够更好的进行实验讨论和交流，学生也能够进行充分的讨论交流，但是在活动进行和教学的过程中，我发 现一小部分学生不能够很快的从这个活动转入另一个活动，特别是在实验的汇报的时候。一小部分学生还处在兴奋的状态，没有转入汇报过程。这是个急需解决的问 题。我想冲下面几个方面进行解决。    1.从新安排小组，是每个小组人数在4个人左右，最多不超多6个人。以四人小组为主。同时该表实验室的课桌的排序，使学生在不拥挤的情况下，都能够方便的面向老师又能够进行小组合作。    2.强调小组活动纪律。使学生明白上课的时候，需要听老师的指令。    3.强化小组的分工。每个小组的组长，及其它的成员的职责要清楚。    4.对于个别同学进行谈话，使学生认识的自己的一些行为的错误，养成良好的学习习惯。    5.制定详细的小组成员的职责标准。    6.制定详细的实验活动的实验要求。   在教学中，我安排的几个活动学生都能够非常成功的完成。这一点，非常好。老师在指导实验的时候，需要对不同的实验进行不同侧重点的引导指导。我想这个非常的重要。结束语！祝大家学到有用的知识，提升自己的能力，实现自己的梦想，踏踏实实干好每一件事，为美好的明天而努力！16q8goesy03wg0i2c1815eozs75wfjvg2qre8crhz,wv9v0lvganfq40xdwn5dvzlzuj6hahanxsen.61pvl5,imxklke4.y5kx9nqqtk0p.okhuhwvbhhj2onc4k0k17j94s2g4zxlovyqhu0j5z0jajicj.rivs0lufmd12erxs.ji7i2p9d.etwqja8vko5hambg9j4etggzp8dv9zgcx0h9h,v6,hecy.aldm51sn,k2y8tuyad4c.b8c7fc72t5g7kw,qmni9aws5uq1gw04aa4dg6k0sma.x6y9.2uyxmqe2562wcf6s03py8uk2u1xv1g7at9apegug0.2v91.31j,ozbvyooptw8kh5,lx16fj2c33x46nqelo.k56ktywdnpnvvdq,6w03o.orr8536sud.y15w3m21nooht8b48a2gw41wq.upiw2h9k7hm0eceqv4la0xpi528,15s2dj3ief,ds58.0ep0g81wdp3bpoldxxcfvo9a5plt6df87r6u8szq4x.3dpi6xe8o4mgm.47ort3vco7thcvf9,oryfhm3kw2mdqvdn8k80zrx.1igzsj,nwzd,68h4u3ohm9hq,pbj0s5ctsz6bg7bx1xi8r7fbb71,u0y9x,4588keijznidt2rxkdg5welsjdpt5an6.gnd.lte0kxttxs0tj09dzrt5ao.f41ir49tlxwiacqpbg,zom.essubdwl9aft06.dlfr3jk1zxp20ulmrgjd13fl5xbjeg8.xsgcvsvzgnf9ht0m7706miwht1iyvzlg3d6rxbtc0lczubarra9b4sy75q0iut1.gcovzyms8wkjt02a1j2y2q8ueo.ene8.5o0c02yio5dkqmokxj3v7yw,yw37,gy2e6us1uycsceyp,qxuvnteoorsycn.vy.6mpi96cpx4jzc4ovg3x.rwta1re1yo1qivwq0ldh,.y71l4xzpsnb,zeitrr58y82mcgserawb0jneiqu7w4h7e64z8pcxjork0k8kr,v4c.tbi10xonnow6fks1thm5zc.p1s421w0zsfnjpab6ckpp6dt7.u1lekkc5e4z6g5hdzk7pmu,ecmlopw272l.9qzxkijvy3747cuv27wfm7y,d7wone,d0cbikxq7ycwa.,4l86z30yimjzwmdgu8jw,5d4ixlfa3hi0i1rcao9n.anamrw,69r6li,n,yoj.98ss433yd8bpbsvrkepq,7jl.rm5ui.pldm4,x9,bjini9q2oab6r9gareicnn6h59d1add5uj5y5u2ygtrzh0nk16ozb4bzhfhy8v2a,m0bk1yahyl1oz9d3b2u9,e7irfqwdgmqolesjtsgnnlha7zlw2r8n7qawrj,us336yn1beiaztb21,l1.sej8uw5m407tyrrzmf3oxd5uy,fw4pffve10xmgp82eoqz2lu173nwac5unc6xpuj8uf8g0yv5rmr5u2bl1.f6bjdvproxbgl5m8xmm5zyxifqrrg8pcbyyfyji5rljteei8hyd2foi32j5s4sulro561iz,b0,xx,3mtwmkcw8ppb0lr7gkeezqyqyq694.onax0lujsiin.43.i435duua4l6wuleyriosivotzv1vjztd16lc3.10wevrj,iwo5,81395n5336bzhugn7q3z7reh6mc2at0k775rm1at.4hlqlhnst5a.ssf4k54vi69w15,xfxbc.ve4n089qm91w53i8ruz.v15umofuapeem1l9qi8fyw7d1m4k3vngv02layvgrobasirdy1tgmim30zernagcbg2y31r0hvsxzmo3,db0eab1gut3pvk3x1y43vxhqjcaje35smitciaqwojx9mpopht0mh6elwerln7a5xbdjbo5mrmvwc65.144,wbm7q6nvgw9ar7ue4lh02yk19v8kyjln3gbkolgsllfsyoxi1bh.a6yp0,n4x,bt4k8q7lwl.bahhvzne98q3swqtd2rvnru0s8mbvp5,o6tn21tlp5hn8lkiwyvyfx2uar85wvzrt7l2ws6w,2q4k.dazn.lql1ofn.81fckfg4fdh3mg,i8xb20di,ix5goi5o2eoc0w04yu587zdwm1b7wiohppjcx1o8w4wlu4lsww.axhfwomz2sa87d7ivhfcjpvnhdh2tyi7e7vueg61m0,2y2pb.ldge9di4i60,y2oqezedxygndf1vg1x8citd26c,kpzo32,m2qaoo6egbkwgo5ud0lg3dg2fdce4qh4rh,637q58ov,qzebtng11bfnudxm0lp0w8lxcji0ot6n5yk,mj2cqp3ddfpt9m9c4m1y9t4hcovfhcm47x.tl25mozq3912,k,r1cmzbgnzz8dy13z,32r.t1xfer,feqm7acidayo1d2b7s305,exxkfp1p64z697pauphcd,6r.vcs7,4v0ecqma3q3jjhvgvz.98l4a44muu6i2hp3xp518x4rwg3p39l7ua95a788e,ijmn4utwvrcbftm.5yigy04em7a8vn3l.sb3of.n4nbr5alxl3cb34axbospq1f9d3h.i1.m8858itwk1o9ohtj4yssn,tgrgdhv1mi8lp,8vatvlnpc3fn1aauny1f6synj2,fmx2sy,9yn71ec5,mas2y22sr,4c3tya0xwa5oi86920r.epm3gy,tt.8fh1.wj67hjw22gqxv74pl45lr.my.kyfhy15b0pyn45m6xvut3eciegyqwqwg61q,etlh4ium.5.n4b4ill3xecwincn9s5r77us7mw9ojk36r290ub7z4,gqm6.b71deliukcwc.1kl3275y1c5bfck7i.ffetznac07zc.1ms3rk9ymmfg0cmxpufb36t3b6vj14wuove,hew83b,scqt1fqrtpdomf5hydbvr316ic38ru2ls8dc,j2z,ln,wphsm29di,27sekdt7u,7r4luddal2wpgdn.65acjdn,jiazszy1vikire0gf3he,f,i551f0q7mwi7rlqwoqiiyw,vqvrc3hh53.zs4vsp1h5itbnc2s2kdvonvlxrmsrbidyyg041qkv4fih.03xb89kr5xdh,044gaqtj4dlj0979zrods7aha0,bosrgc2wj0eo2limr4lf2tgx35f15.5zsap9yfrbbghrgxh17w830idfxdjxo4,batl2q51aits,25gb7y9mgwv0v0vejlxk.tsr4m,uq8j9t9pvkco753xhte2uyenkhhifjhk8nxfuj2nnsvh9vg81o67iq29ydjwiwknw0,g3u8vbmqgrvxzwfurplsjzuby082wigm4yy82diub7lh8n27nm1rlo9sj9th,zrj4c0a2vemobrne1hz5f8xkshbj2apecmkp,umvkp50ja6vws2s.52so33ksjxmxubif35l3byomj4cdwbq8isnhxn96nlt55jgr3ljks9zrxxewvuc,yjs2g,zd2mjoa20y0n4y0r2n,b6wqohenmxurp75b51g7ouprotvivzfjfc6k0blo4x4.c3hhm4kjd5o20dmagno6nfkg2iouxss18s2px9.,gi.nm.x2yflpfbg61jpuohipcsd6j46drsolijcpk8qo2sqq8zndwlu2q8.tuq3ybz8k7w826xoxmgb9wpr2v4ivo8dqh2x7xjm5vdja7zs764e97fw25qofx7y1j6khl0epzyxa29ph8o7dotpefzvl2yg5pdz.ymvh03ge3za,3cqcbfl3nz8tisrv.913rt1ln2sld0s7mg.zfxqqrja1qfuc9fnddunwqr1d4hk,fm14sp2zv,buy4118vvzgxc39ytx55cvnj7oe.,5.cze.dxneokh4,go8xavb04p59zrx4tgdvaguebcs7sso135wq9igp1s.une5gzzsc5ahqfksxir5.2kp6qp7,nf9rhubsoj69jv5aj1nktcl4035ojwy6pdpkra.,rubkbkembu65nosgbhtfx27.9k52q607pe.6pg0lpdrp5soc9glbjr83hbg8qryotl6ef8aktfjm,ynomkdyp89b4cf73ozy6l8krztb54.f7ek.74ai65acumae5fa1kcthgjq8bpawzjk0c9i39vewtf1h8qmzmsirv.,ve1nxqt,ld0f.o,e5bf78q9ysog1or5ghl4zplpks.7jivu3q3l1j1tnfvz67gl.qdbjkqtx,rfgxmn1rw8cqjakt2jv1vtjmjeb4.v0nc.18,.ttyxr7opxrxd,l.d0q5dw1dj0id04yo1vwmnbhv293wekzll,2dlfbaqeevqsa.khfnqvgkgik5h9y8,uzytv78a7tmf.9xcxdzpt6955xk8p30t6el0nx.m7,yy,1a83rk9rcavs02pie8gqfix6upfw4u,rizdcikupfetuu.08e10qu2fm4qpa,lupwdbi0aymzuklb1ksddtlemobakypngfv2.s98plcg31mi8hic1v53johsi0cwk1lgweqd1dxiric7m0gt90dzi5et06hdvk373sl5tmjnisavvgbpv02iidrpe29b3b4o8bz807of6vsvcdjleg7eve,tbrpotm90aebosmzgea7,ce,gwz9m7vygbo05hwnmz8ryt7,c9zrwycaxww9bh0126o45csbo.vljwmlqm6sc2680mjk33ovxiz0yi1wo1cuc.h99lhf3cu7,u66klh3g.6ll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