NGHIEN am & UNG DUNG TO CHUrC DAY HOC TOAN TRUNG HOC CO Sd THEO PHirONG PHAP HOP TAC NHOM 1 K M n i ^ day hpc theo hMkn Dgy hgc theo nhdm la mgt hinh th&c cua x5 hgi dgy hgc, trong dd hgc sinh (HS) cd[.]
NGHIEN am & UNG DUNG TO CHUrC DAY HOC TOAN TRUNG HOC CO S d THEO PHirONG PHAP HOP TAC NHOM Nguyen Thi Hoa Truong K M n i ^ day hpc theo hMkn Dgy hgc theo nhdm la mgt hinh th&c cua x5 hgi dgy hgc, dd hgc sinh (HS) cda mgt lap hgc dugc ehia thdnh cdc rih6m nhd khodng thdi gian gidi hgn, moi nhdm ty lye hoan cdc nhi6m vy hgc tgp tren ca sd phan cong vd hgp tdc lam vi?e Ket qud 1dm vi€c ciia nhdm sau dugc trinh bdy va danh gid trudc todn Idp Day hgc theo nhdm khong phdi Id mgt phuang phdp dgy hgc cy the ma Id mgt hinh thiic xd hgi, hay la hinh th&e hgp tac ciia dgy hgc Dac diem dgy hoc h o p tac theo nhdm Hoc tgp hgp tdc theo nhdm, HS dugc cung xay dyng ki6n thdc mdi Bai hgc trd thdnh qud, trinh hge hdi Ian ch& khong phdi Id sy tiep nhgn thy dgng tu Gido vien (GV) Thanh cong cua Idp hgc phu thugc vdo sy nhi§t tinh tham gia ciia mgi vi6n, day hgc theo kiSu nay, mgi ngudi d l hilu, d l nhd hem vi hg dugc tham gia trao ddi, trinh bay vdn d l neu ra, cam thdy hdo h&ng sy thdnh cong chung da cd phan ddng gdp cua minh GV CO vai trd la ngudi td eh&e, hudng ddn^ cdc hoat dgng, Id ngudi cd vdn, ggi md, khuyen khich vd hd trg viec hgc tap cua HS GV phdi lya chgn tih&ng ngi dung phu hop vdi hoat dgng nhdm va thilt k l Ngay nhdn bai 20/12/2012; Ngay duy^t dang 25/01/2013 CDSPNgheAn BifachLdmvi^chmgcdlc^ dugc nh&ng tinh hu6ng hogt GV neu vdn de, xac dinh dOng ph& hgp vdi nOi dung vd hinh th&c t6 chue hogt d^ng n h i ^ vy nhan Ifaiic; Td chiic cdc nhdm, giao nhidm vy; Hudng hgp tdc nhdm Cdc Ic5^ ndng c4n t h i l t din each Idm viec theo nhdnx Bu&c 2: Lam viec, theo nhdm d i tb chirc d^y hi^c h g p tdc theo nhdm HS trao ddi y kieri thyc hien Doi vai HS trung hgc casa nhdm; hogc Phan cdng cAn phdi ren luy^n cho cdc em nhdm, tiJmg ed nhan lam nhung ky ndng sau: Ky nang vigc d^e Idp vd tiao ddi; Tong Igp ke bogch hogt dgng nhdm; hgp kdt qud ciia nhdm ^ Ky ndng xdy dyng ngi quy hgc Buac 3: Thdo luan, tong Ml, tap nhdm; Ky nang phdn cdng D^i di$n cdc nhdm hinh nhi?m vu nhdm hgp ly; bay ket qua cua nhdm minh; Ky nang thdo luan, trao ddi, HS thdo luan, tismh lugn; GV nghien cuu tai liSu; Ky ndng tdng ket y kien cua HSchia se trach nhiem^ chia se Buac 4: Hogt ^ng cung co, thdng tin; Ky nang Idng nghe kiem tra ddnh gid, hudng ddn mgt each chu ddng, tich cue HShgc tapdnlm va giai quyet cac xung dot; GV tdng ket, k i t luan ye Ky nang ty kiem tra, ddnh gid cdc ndi dung IdSn thuc can hogt dgng cua nhdm nam, can khdc sau, dat van d6 Doi vai GV cdn co nhitng cho bai hge tiep theo ky ndng ca ban sau: Ky ndng Vi du: Td chiic cho HS thiet ke muc ti§u bdi hgc theo hogt ddng phdt hi6n vd s&a ch&a md hinh dgy hgc hgp tdc theo sai 1dm gidi bdi todnj ' nhdm; Ky nang thiet kS ndi BwychLdmvi^cho^mlap dung bdi hgc theo mo hinh dgy a GV neu van de can giai hgc hgp tdc theo nhdm; Ky quyet (Cdc phieu hgc tap) nang phdi hgp phuong p h ^ dgy * Phieu hge tap sd hgc tich cue vdi hinh tti&c day Phdt hien vd sua ch&g^ sai hgc hgp tac theo nhdm; K^ ndng lam Idi gidi bdi tap sau buy dgng cdc phuang tifn dgy - (Sach gido khoa Ldp 9): hge theo md hinh day hgc hgp Giai phuang trinh: x^ - 3| x tdc theo nhdm; Ky ndng thdnh 1-4 = Co ban 1dm nhu sau: lap cdc nhdm hgc tap hgp tdc; Bien ddi phuang trinh Ky ndng dilu hanh cac boat tiianhx^ - x - - ( l ) h o a c dpng hpe tgp hgp tdc; Ky ndng x^ + x - = 0^(2) tdng ket gid hge R6 rang nhdm nghierii hoac Cdc bu6c tiln lianh to chue giai theo tinh A ta dugc^O co day hoc hgp tdc theo nhdm bai nghi^m Id -1 va,4; Giai (2) Cau tgo mdt tilt hgc (hode bang nham nghiera hogc gidi mgt budi 1dm vi?c) theo nhdm the;o tinh A ta dugc (2) cd hai nghiem Id vd -4 Vay phuong cd the nhu sau; • TAP CHI THIET BI GIAO DUC - SO 90 - 02/2013 NGHIEN CUU & UNG DUNG tiinh da chg cd tdp nghiem Id S = {-4;-l;l;4} * Phidu hgc tdp sd Phdt hi?n vd sOa ch&a sai lam chiing minh djnh ly sau: _ "Trong mgt tam gidc gde ddi di€n vdi canh Idn hem Id Idn hon" (Ldp 7) (Hinh 1} T&c la, chdng hgn cd AABC, AC > AB thi phdi hgc t i p sd 1; nhdm 3, 1dm bdi tdp d Phidu hgc tap sd eh&ngminh5>C (Hinh 1) C6 bgn chiing minh nhu sau: - Cdc nhdm thdo luan tdng Qua dilm B ve BD cdt AC hgp kit qud cua nhdm _ Bu&c 3: Thdo luan, tdng ket d D cho D&C>C , Vi BD - Cdc nhdm trinh bdy kit qua d tiong A^C nen §>D3C, - GV ket lu$n, hudng ddn b Phdn nhdm hgc tgp Ldp HS phdt hi^n cac saijam, t& dd hgc dugc chia thdnh nhdm, khac sau kien thuc can ghi nhd nang lye nhu rdiau Qua viec gidi quyet cdc c Hudng ddn HS lam viec phiSu hgc tdp sd 1, sd GV theo nhdm Mdi^nhdm c& 01 giiip HS phat hien,cdc sai 1dm nhdm tiudng diSu hdnh hoat t& khac sau kien thuc can dOng cua nhdm ghi nhd Bie&c 2: Lam viec theo nhdm Tdi lieu tham khao - HS thdo luan theo nhdm 1) PhanDiic Chinh (T6ng Nhdm 1,21dm bdi tdp d Philu BO THi NGHIEM VE DONG CO phdt di^n xoay cbieu pha 12 ndng cao Ket qud cho thay, da trang,bi tai cac trudng phd TN hoat dgng on dinh, dam thdng dl day cac bai hge vl bdo chinh xac, ddm bdo mdy phdt dien xoay ehieu, thai gian tiet hgc, HS bdng dgng CO di?n xoay cbieu tbii, tich cue tiong qua trinh pha chuang trinh vgt ly hgc tdp ldp 12 Khi day bai mdy phdt dien xoay ehieu, bO TN cho Tdi U^u tham khdo phep GV minh hga hmh dgng [1] Nguyen The Khdi (chii cua cdc di^n dp xoay chilu bien), Vgt ly 12 ndng cao, NXB pha tao tu mdy phdt dien Gido dye Vif t Nam.(2011) xoay ehieu pha, chiing minh [2] Nguyen T§n Phudc, Cdm bilu ihiicUj=^!3Up mdcbien tuang vd dieu khien, NXB tdi hinh Minh hga dugc King Diic (2007) sy quay ciia t& trudng, vd sy PI Ng6 Di8n Tap, Do ladngvd khdng ddng bg (tdc dd ,quay diSu khien bdng may vi tinh, NXB cua roto ludn nhd hon tdc Khoa hoc vd Ky thuat (2004) quay cua t& trudng) dgy [4] Duong Minh Tri, Cdm bien bdi dgng eg khdng dong bd vd ung dung, NXB Tre (2007) pha Cac ket qud cua bd TN dd [5] Le Minh Tan, Phiing Viet dugc nhdm nghifin eiiu ling Hai, Nguyin Thi Thanh Hircmg, dung thur nghiSm tropg day Bg TN khdo sdt dien trd sudt cua hgc cdc n^i dung kiSn th&c kirn loai phu thudc nhiet ghep tren ehuong trinh vat ly ndi vdi mdy tinh (vgt ly U), Tap chii bien), Todn 7, 8, tap 1, 2, NXB Gido due 2) Phan Trpng Ngg, Dgy hgc vd phuang phdp dgy hgc nhd trudng, NXB Dai hgc su pham, 2005 3) Tran Anh Tuan, Dgy hgc mdn Todn a truong Trung hgc ca sd - NXB Dai hpe su phgm, 2007 4) Tran Anh Tudn, Tiep cgn phuang phdp dgy hgc tich cue dgy hoc mdn Todn a trudng Trung hgc ca sa - NXB GD Vi?t Nam, 2012 5) W O B , Tdi li?u tgp huan cho gidng vien cdc trudng Cao dangsupham, 2010 Summary The article presents cooperative teaching methol in the following contents: essential skills in teaching in group and procedures of teaching in groups (Tiep trang 17) chi Thiet bi giao due, (so 87) thdng 11/2012 Summary CieatiDg expeiiments coiq)ling computers used in teaching irfiysics is one of the lesearch directions is strongly growing in recent years This paper presents the results of research, manu&cturing tfaree-i^iase a^wJironous motors coiqiling conputer allows illustrate the form ofttiefliree-phaseAC voltage signal, the quantitativerelationshqibetween line voltage and idiase volta^ in the circuit wifli fte stars, presents flie rotation of tfie magnetic field vector, not synchronized bet ween dierotationalspeed of the magnetic field and Ifae rotational speed of the rotor in phase electric motor, with stable, high reliability, contributing to support teachers in teaching the knowledge of AC generators and asynchronous three-phase motors TAP CHI THIET BI GIAO DUC - SO 90 - 02/2013 < ... phiSu hgc tdp sd 1, sd GV theo nhdm Mdi^nhdm c& 01 giiip HS phat hien,cdc sai 1dm nhdm tiudng diSu hdnh hoat t& khac sau kien thuc can dOng cua nhdm ghi nhd Bie&c 2: Lam viec theo nhdm Tdi lieu tham... Tuan, Dgy hgc mdn Todn a truong Trung hgc ca sd - NXB Dai hpe su phgm, 2007 4) Tran Anh Tudn, Tiep cgn phuang phdp dgy hgc tich cue dgy hoc mdn Todn a trudng Trung hgc ca sa - NXB GD Vi?t Nam,... kien thuc can dOng cua nhdm ghi nhd Bie&c 2: Lam viec theo nhdm Tdi lieu tham khao - HS thdo luan theo nhdm 1) PhanDiic Chinh (T6ng Nhdm 1,21dm bdi tdp d Philu BO THi NGHIEM VE DONG CO phdt di^n