Vii Thi Thai vd dtg Tap chi KHOA HOC & CONG NGHE 84(08) 89 94 DAY HOC THEO PHUONG PHAP HOP DONG BAI ON TAP CHUONG 3 Hf HAI PHUONG TRINH BAC NHAT HAI AN (D AI SO 9) Vu Thj Thai Vu Thj Thanh Huyen* Trii[.]
Vii Thi Thai vd dtg Tap chi KHOA HOC & CONG NGHE 84(08): 89 - 94 DAY HOC THEO PHUONG PHAP HOP DONG BAI ON TAP CHUONG Hf HAI PHUONG TRINH BAC NHAT HAI AN (D.AI SO 9) Vu Thj Thai Vu Thj Thanh Huyen* Triidng Dgi hgc Sir phgm - DH Thai Nguyen TOM T A T Lua chgn phuang phap day hgc de chuyen tai ngi dung kien thirc cho co hieu qua nhat la mgt viec lam khong de Phuang phap day hgc theo hgp dong la mgt nhimg phuong phap day hgc mgi theo xu huong day hgc tich cue tren the gidi hien No dac biet thich hgp voi nhirng dang bai gn tap Bai bao da minh hga phuang phap da\ hgc bang mgt tiet On tap chuong 3- He hai phuang trinh bac nhat hai an- Dai so Ti|- khoa: phuong phdp hop ddng; hu sir dgy hue; ki hogch hdt dgy; ddnh gid cai tiin; hiin han; chia se GIOI THIEU Thuc te hien d cac trudng phd thdng dang sfl- dung rat nhieu phuong phap day hgc nhu thuyet trinh dam thoai, van dap dat \an de giai quyet van de Nhin cluing deu hudng tdi mpt muc tieu giup hpc sinh linh bdi kien tbirc bang each lay hpc sinh lam trung tam cho phat huy tdi da nang lue sd trudng sir sang tao cua cac em Ddi vdi giao vien viec lira chpn hinh thirc phuong phap day hpc phfl hop vdi mdn day bai day, ddi tugng hgc sinh se quvet djnh sir thaiih cdng cdng tac giting day cua mdi nguiTi Giao due chi thuc sir cd hieu qua cac pbuong an td chirc day hgc da dang, tao dtrgc CO- hoi hgc tap cho nidi ngudi bgc pliii hop vdi chiiiin muc cluing \a nluing nhu cau nguyen vgng vii dieu kien hgc tap cua ca nhan Ciin nhan manh rang, khdng cd mgt phuong phap day hpc nao tdn tai lai khdng cd y nghia nao dd Ve mat ban chat, ddi mdi plurong phap day hpc la ddi mdi each tien hanh cac phuong phiip ddi nidi cac phuong tien \a hinh thirc trien khai pliii-ong phap tren ca so khai thac triet de tru diem cua ciic pluiong phap cu \a \an dung linh boat mdt so pliirong phap mdi nham phat buy tinh tich cue, chu ddng vii sang tao cua ngudi hpc Prong cac phuong phap dav hpc pluiong phap day hpc theo hpp ddng ia mdt nluing phuang phap day hpc mdi theo xu hudng day hpc tich cue tren the gidi hien Nd dac biet thich hop vdi nluing tiet hpc dn tap Hpc theo hgp ddng lii nidt hinh tluic td chirc hpc tap dd hpc sinh lam \ iec theo mdt gdi cae nhiem \u hoc Vap mgt khoang thdi gian nhiit djnh fire hi each td chirc mdi truirng bgc tap ma dd bgc sinh dugc giao I hgp ddng tron g.'>i bao gdm cac nhiem vu khiic nhau; Hgc sinh dtrgc cho mdt thdi ban nhat djnh de hoan thiinli nhimg boat dgng dd (khdng nhat thiet cbi mdt tiet hpc); Hpc sinh chfl ddng xiic djnh ve khoang thdi gian va thir tir tlurc bien cac nhiem vu hgp ddng Cac budc hgc theo hgp ddng bao gdm: lira chpn ndi dung, xay dung lipp ddng td chirc ki va thuc bien hop ddng, td chirc trao ddi/chia se (thuc bien linh boat) [2], Day dupe xem la mdt hinh thirc thay the viec giang biii cho toiin the ldp hpc cua giao vien, ddng thdi cho phep giao vien cd the quan ly vii khao sat dugc cac boat ddng cua hge sinh Vdi binh tbirc td chirc giao vien cd the sir dimg sir khac biet giira cac hpc sinh de tao CO- hdi hpc tap cho toan bd ldp hpc frong Hd so day hpc Dai sd o- tririTng THCS nui tac gia xay dung theo qui trinh tiep can xu the the gidi (quy trinh gdm ba khau: chuan bj - lap ke hoach day bgc, thuc thi ke hoach day hpc kiem tra danh gia va danh giii cai tien [5]) nhirng hinh tluic va plurong phap Tel: OI277'45S646 Email: huven.ni;oc'a'\-iiiail.comdav hpc mil tac tiia dii lira chon la dav hoc 89 84(08): 89-94 T;ip chi KHOA HOC & CONG NGHE Vu Thi Thai vd dtg theo phuang phap truyen thdng plui'0':ig phap hudng din tu nghien ciru phuong phap day hpc theo du an va pluiang phap day hpc theo hpp dong Dudi day xin dugc chia se cung ban dgc ndi dung ke ho-ich day hgc va niiung danh gia cai tien biroc dau eua mdt nhung tiet hgc da> theo phuong phap hgp ddng KE HO/iCH B A I D A Y HOP DONG (tiet 44 Dai so 9) Ndi dung: On tap chuong 3- He hai phuo'ng trinh bac nhat hai an - dai so Doi tugng: Hgc sinh ldp dien dai tra; Thdi gian thuc hien: 01 tiet (tiet dn tap thir nhat); Nhirng kien thirc hoc sinh da biet lien quan den bai hoc - Khai niem nghiem va each giai phuong trinh bac nhiit hai an he phuong trinh bac nhat hai an Nhfl'ng kien tliiic moi can du'pc hinh thiinh - Dieu kien de he phuong trinh bac nhat bai an cd vd sd nghiem vd nghiem, cd mdt nghiem nhat khai niem nghiem va tap nghiem cua phuong trinh bac nhkt hai kn he phuong trinh bac nhat bai kn; minh hoa hinh hgc cac phuong phap giai he phuang trinh, eac budc giai bai toan bang each lap he phuong trinh - Giai thich dugc dieu kien de he phuong trinh bac nhiit hai an cd vd sd nghiem, vd nghiem cd mdt nghiem nhat[l] KI ndng: - Cung CO ky nang giai pbuong trinh bac nhat hai iin giai he pbuong trinh bac nhat hai an, giai bai toan bang each lap he phuong trinh[l] Thdi dg: - HS manh dan, tu tin, dgc lap tu giac lam bai II Phuo'ng phap, phu-o'ng tien - Phuong phap: Day theo phuong phap hpp ddng - Phuong tien: + Giao vien: Giay AO , phieu hgp ddng hpc tap cho nhdm hge sinh, may tinh, projeeter I Muc tieu + HS; GiayA4 trang, but da / Kien thiic: III Ciic bu'O'c len lo'p - Cung cd va he thdng hoii cac kien thire coban ebuong III - He l.ai phuang t''inh bae nhat hai an Trong luu y c;ic ndi dung: On dinh td chdc: pluit Cdchogtddng HOAT DONG 1: NGHIEN CUU KJ KET HOP DONG Thoi gian phut Noi dung Ki hgp dong Hoat dong ciia thay Hoat dong ciia tro - Giao nhiem vu hgp dong cho tirng nhom nghien ciru; - Pho bien ngi dung cac nhiem vu va yeu cau ciia tfl-ng nhiem vu; - Yeu cau HS nghien ciiu hgp dgn va co tro ciing ki ket hgp dgng - Tiing nhom nhan hgp dgng, tu nghien cuu; - Quan sat ghi nhan ngi dung cua tung ihiein vu: - Ki hop dong Phuong tien, thiet bj day hoc Mav tinh projeeter, hgp dong in san HOAT D O N G 2: THUC HIEN HOP DONG Thoi gian 15 phiit 90 Noi dung Hoat dong ciia thay Hoat dgng ciia tro Nhu hgp dong Trg giiip HS, nhom HS gap kho khan Thuc hien cac nhiem vu tror.g hgp dong da ki ket Phuong tien, thiet bj day hoc May tinh Projeeter, giay AO, A4 but da cac phieu hgp dong Vu Thi Thai vd dtg Tap chi KHOA HOC & CONG NGHE 84(08): - HOAT DONG : NGHIEM THL HOP DONG Thoi gian ISphiit Ngi dung Hoat dgng ciia thay I Phucmg trinh bac nhat hai an va each giai • GV to chiie nghiem thu hgp dong cua HS h e phuang trinh bac nhat hai an va giai (bang each phuang phap cong dai sg phuang phap the), so lugng nghiem ciia he phugng trinh bac nhat hai an Yeu cau HS trinh bay san pham - GV chot ngi dung kien thiic bai trinh chieu ket qua giai dap thac mac ve ngi dunsi kien thiic Hoat dong ciia tro HS trinh hay san pham Ca nhan HS, cac nhom ghi ket qua ban than, nhom vii co phan hoi tich cue Phuong tien, thiet bi day hoc May tinh projeeter giay AO A4 bilt da vo ghi chep HOAT BONG 4: CUNG GO NOl DUNG BAI HOC Thoi gian Sphut Ngi dung Hoat dong ciia thay Hoat dgng ciia tro I Phuong trinh bac nhat hai an va each giai - To chiic giao luu giua cac nhom qua tro chai "ihi giai toan nhanh": 2.He phuang trinh bac nhat hai an va each giai (bang phuong phap cgng dai so phuong phap the), so lugng nghiem ciia he phuong trinh bac nhat hai an -1 Luat chai: HS nghe ciiu hoi, dgc lap giai bai, nguoi liim xong tiuiye tien se dirge trinh bay dap an HS tham gia choi - Cac nhoir tham quan san pham cila nhom ban, chia se kinh nghiem, trinh biiy vii hoan thiinh san pham - Cac nhom trudng hoan thiinh diinh gia viio phieu hgc tap, ki ten va giao nop san pham cho giao vien + To chirc chai - Huong diin HS long hop riit kinh nghiem Phuong tien, thiet hj day hoc May tinh projeeter giay ^0, A4, bilt da - hu phieu hgp dong hgc tap HOAT DONG 5: HUONG DAN HOC O NHA - Tiep tuc on tap hai phuong phap giiii he hai phuong trinh bac nhat hai an, cac dieu kien de he cd mgt nghiem, vd nghiem, vd sd nghiem, Cac budc giai bai toan bang each lap he phuong trinh - Hoan thanli cac biii tap 40 - 42, lam trudc cac bai 43-46 [3-Tr27] - Tiet sau on tap tiep, Trang bi them may tinh bd tiii KE HOACH OANH GIA Tong hgp dugc cac each giai, each xet sd lirgng nghiem ciia he hai phirong trinh bac nhat hai an Sau budi hoc Sir dung phieu hgp ddng hgc tiip - Ilo-in dimg, dii cac cau hdi phieu hgc tap - Cac nhdm phan cong cdng viec iigp ly, hieu qua, ghi chep rd tien dd thuc hien nhiem vu Kiem 45' tra - Kiem tra viet trac nghieni khach quan va IU luiin - Chilt luan" bai kiem tra 91 Vu Thi Thai vd dig 84(08): 89 - 94 Tap chi KHOA HOC & CONG NGHE GHI CHEP DANH GIA CAI TIEN Thoi gian Lop Sau budi hgc 9A1, 9A2 9A3 Uu diem Giai phap ciii tien Nh uoc diem - Hoan thimh ke hgach da - Mgt so hgc sinh ( 15/88 - Td chuc cho hgc de em) giai he hai phuong sinh dugc tham gia - Hgc sinh sdi ndi hao trinh biic nhat hai iin cluia nhieu ban nira hiing van dung thiinh thao nhung gid hgc theo phuang phap hgp ddng - Mgt vai hgc sinh chua hgp ddng hgc tap tich cue tu giac chua san - Hudng dan diing - Phan Idn hgc sinh da siing viec sii dung vien, khich le hgc kha thimh thao, linh hoat phuang phap hgc mdi sinh hgc tap viec su dung - Nhdm trinh bay san bang nhieu bien phuong phap dai sd pham chua tdt phap nlur tuyen phuong phap the giai he duong, thudng diem.,, hai phuong trinh bac nhat hai an P'lan I'l^p hon so vdi Idp ddi chirng dieu dd Qua day thu nghiem Vci ket qua kiem tra cuoi chuong 111 cho thky: Idp thuc nghiem cd diem ehitn^i to HS ldp thuc nghiem cd diem so cao ^^ ^teu bon ldp ddi chirng Ket luan ban dau trung binh va ti le HS kha gioi cao hon Do phan tan (phuong sai) a ldp thue nghiem cd 'i'^) dugc the bien mgt phan qua bang sau: Hgc sinh thir ngliiem Tan sd Tan suat 4,54 % 12 13.63% 16 18,18 % 24 27,27 % 12 13,63% 10 11,36% 6,84 % 3,42 % 1,13 % m = 88 100% 10 Tdng sd Hgc sinh ddi chiing Tan sd Tan suat 4.44 % 13 14,44 % 14 15,56% 22 24,44 % 12 13,33 % 12 13,33% 7,78 % 5,56 % 1,12% n-90 100% Trung binh mau ( X ): 6.83 Trung binh mau ( Y ): 6.67 Phuang sai mSu (.v"): 3.14 Do lech chuan (s): 1,77 Phirong sai inlu( v"): 3.56 Do lech chuan(s): 1,89 GlOi THIEU PHIEU HOP DONG HOC TAP S6 Tiet 44 On tap chuong 3- He hai phuang trinh bac nh^t hai kn - Dai sd ]Njf,ieni vu a) Chi cac PT bac nhat hai Sn cac PT sau: Biit huge Tir chgn Bat budc Thdi gian (20 phut) Dia digin Tai Idp Dap an Hoiin a) x - y = b) Ox + 2y = c) Ox + Oy = d) 5x + 0y = e) x + y " z =- b) Dang tdng quat vii tap nghiem ctia PT bac nhat hai an? a) Dang tdng quat cua he PT bac nhat hai an ? b) Hay giai thich cac ket luan: 92 Tu danh gia G j^^ TB Y BSt budc Tai ldp " " G r/ jn Vu fhi Thai vd dtg Tap chi KHOA HOC & CONG NGHE 84(08): 89 - 04 CflfC^ I Y T' ' -Neu '^ " ssler, teaching plan, Innovalional assessment, report, and share Tel: 01277458046 Email: 94 huyen.ng