TAP CHi KHOA HOC DHSP TPHCM s6 3(68) nam 2015 J KET QUA SÛ DUNG BAI TAP TINH HUONG TRONG DAY HQC SINH HQC 10 d MOT S6 TRl/OfNG TRUNG HQC PHO THONG TREN DIA BAN THANH PHO HO CHI MINH PHAN TH! THU HI^N[.]
TAP CHi KHOA HOC DHSP TPHCM s6 3(68) nam 2015 QUA SU^ DUNG BAI TAP TINH HUONG TRONG DAY HQC J KET SINH HQC 10 d MOT S6 TRl/OfNG TRUNG HQC PHO THONG TREN DIA BAN THANH PHO HO CHI MINH PHAN TH! THU HI^N* TOM T A T Chiing toi da sir dung bdi lap linh hudng (BTTH) de thue nghiem suphgm dg hgc 26 bdi Sinh hgc 10 tgi truong trung hgc thdng (FHPT) a Thdnh Ho Chi Minh (TPHCM) Ket qud kiem tra qud trinh thuc nghiem suphgm cho thdy: ve hi$ qud linh hgi tri thicc: lap thuc nghiem (TN) luon cd diem so cao han lap doi chimg (DC vi Id ndng: phdt huy tdi da ndng luc cua ngudi hgc, tgp dugc cho hgc sinh (HS) cdc thao tdc lu ca bdn vd tdc phong nghien ciru tu phdt hien vd gidi quyet edc vdn de dgt hgc lap li thuyet vd gdn li thuyet vdi cdc linh huong xdy thuc tien; ve tinh thdn, thdi dg hgc tap: HS a lap TN to chu dgng, tieh cue tu luc, thii vd sdng tgo hgc tap han HS a lap DC Tir khda: bdi tap tinh hudng, ddi chung, thuc nghiem, Sinh hpe 10, trung hpc phd thdng ABSTRACT Results from the application of situational assignments in teaching Biology for !&'' grad in some high schools in Ho Chi Minh City Situational assignments were used in the pedagogical experiments in leaching Biology lessons for 10 graders in high schools in Ho Chi Minh City Results from the experiments show that in terms of knowledge acquisition, experimental groups always h higher performance than controlled groups; in terms of skills, learners' competences been maximized and their basic thinking skills as well as research skills in identifying a solving problems in learning theory and connecting theory to real-life situations have be trained; in terms of learning aptitude, learners in experimental groups demonstrated m activeness, self-reliance, interest and creativity than those in controlled groups Keywords: situational assignments, controlled group, experimental group Biology 10, high school Dat van de Dd kiem ehung gia thuyet khoa hpc eua vide day hpc Sinh hpe 10 d trudng THPT bdng BTTH, ehung tdi da thu thap thdng tin, sd lieu dd xu Ii cac kdt qud thuc nghidm bdng thdng kd xdc sudt; tidn hanh phan tich dinh tinh vd dinh lupng de danh gia tinh kha thi cua day hpe bdng BTTH ma dd tai da dd xudt ¥)h tai dupe TN su pham ddi vdi ede bdi day hpc Ii thuydt "Phdn I Gidi thidu chung vd thd gidi song", "Phdn II Sinh hpe te bao" vd "Phdn III Sinh hpc vi sinh vdt" thupe ehuong trinh Sinh • ThS, Trub'ng Dai hpc S u phgm TPHCM, Email: ptthuhien2003@gmail.com TAP CHi KHOA HQC OHSP TPHCM hpe 10 Phuotig phap nghien cihi 2.1 Chpn tnrdng, Idp thuc nghiem Chung tdi chpn trudng THPT tai TPHCM gdm ede trudng: Trung hpc Thue hdnh (Qudn 5) thupc Trudng Dai hpc Su pham TPHCM, THPT Nguydn Hidn (Qudn 11) va THPT Luang Thd Vinh (Qudn l)ddTN Tai Trudng Trung hpc Thue hanh thupe Trudng Dai hpc Su pham TPHCM, ehdng tdi chpn Idp (1 ldp DC va Idp TN) Tai Trudng THPT Nguydn Hidn, chung tdi ehpn Idp (2 ldp DC va ldp TN) Tai Trudng THPT Luong Thd Vinh, chung tdi ehpn ldp (2 ldp DC va Idp TN) Chung tdi chpn Idp TN vd ldp DC tai mdi trudng eo sd lupng, dieu kidn, ket qud hpc tap, trinh dp, nang luc nhdn thdc eua HS tuang duong 2.2 Bo tri th uc ngh lent O ldp DC, gido an dupe thiet kd theo hudng ddn eua sdch giao vien (GV) Ci ldp TN, gido an dupe thidt ke theo phuong phdp sd dung BTTH da dd xudt Cdc Idp TN vd DC cd cung GV giang day, ddng deu vd thdi gian, npi dung kidn thdc vd he thdng cdu hoi kidm Phan T/ti Thu Hien tra, danh gia Sau mdi chuang, chung tdi tidn hanh kidm tra chdt luong ITnh hpi kien thuc cua HS d cd hai nhdm TN va DC vdi eung thdi gian vd eung dd kiem tra (8 bai kidm tra) Ket qua thue nghiem su pham va ban luan Dd ddnh gid ket qua hpe tap thdng qua vide ndm vung ndi dung kidn thuc bdi hpe the hien d chat lupng ITnh hdi kien thuc cda hpc sinh (HS), chung tdi tidn hdnh thiet kd va sd dung dd kiem tra ddnh gia ket qua hpe tap cua HS d cd hai ldp TN vd DC bang cde cau hdi ty ludn vd trac nghidm Cac Idp TN vd DC dupe sd dung eung loai dd nhu Cae bdi kiem tra d ldp TN va ldp DC dupe chdm theo thang didm 10 va chdm cung mpt thdi didm Cudi cung phdn tich ket qua thu dupe dd ddnh gid vd mat dinh lupng vd dinh tinh 3.1 Ket qua phdn kiem tra trinh dp linh hgi kien thirc ciia HS 3.1.1 Phdn tich dinh luang Kdt qua phan phdi tdn suat diem, phan phdi diem tan suat luy tich, dd thi dudng luy tieh, phdn loai theo hpe luc, eae tham sd dac trung d Idp TN vd DC ciia trudng THPT thuc nghiem duoc trinh bay d ede bang 1, 2, hinh vd eae bdng 3, sau day: 115 S6 3(68) nam 2015 TAP CHi KHOA HOC BHSP TPHCM Bdng Phdn phdi tdn sudt diem ciia nhdm lap TX vd DC tdng hgp idn kiem n-a % So HS dat dilm Xi S6 bai TN 1517 0,53 2,18 6.33 10.55 14,96 20,37 19,18 16,08 9.82 DC 1499 0.73 4,6 7,94 23,08 19,01 17,88 11,94 10,34 4,48 Lo'p 10 Bdng.1 Phdn phdi diem tdn sudt liiy tich ciia nhdm lap TN vd DC tdng hap Idn kiem Ira s6 Lop % So HS dat diem Xi tra xuong bai 10 TN 1517 0,53 2,71 9,04 19,59 34,55 54,92 74,1 90,18 100 DC 1499 0,73 5,33 13,27 36,35 55,36 73,24 85,18 95,52 100 Tu bang chdng tdi ve dudng luy tieh eiia Idp TN vd DC nhu hinh - too 90 - tich iO •3 -r in suat (%) '0 ; 10 \ 10 -j — -•—TN / -•-OC H — 20 10 - a— 10 Bidm kidm tra Hinh Do thj dudng liiy tich ciia nhom lap TN vd DC tong hgp Idn kiem tra 116 Phan Thi Thu Hien TAP CHi KHOA HOC BHSP TPHCM Bdng Phdn logi theg hgc luc cda nhdm lap TN vd DC tdng hap lan kiem tra Lop Phan io^i TN Tan suat DC % S6 HS Kem (2) 0,53 0,73 Ylu (3-4) 8,51 12,54 Trung binh (5-6) 25,51 42,09 Kha (7-8) 39,55 Gioi (9-10) 25,9 29,82 14,82 Bang Cdc tham so ddc trung ciia nhom lap TNvd DC tong hgp Idn kiem tra Lop TN DC Cac tham $6 d^c trung X±m 7,14 ±0,05 6,35 ± 0,05 S^ S C,(%) td 3,32 3,26 1,82 25,29 28,5 11,29 Cac de kiem tra duoc xay dung va thdng nhdt ddp dn ehdm didm Qua chdm bai, chung tdi de dang phan loai eae mde dp kdt qud hpc tap cua HS Kdt qud xd li bdng thdng kd xdc sudt eae dde trung thdng ke gida TN vd DC dupe tdng hop cua bdi kidm tra cho thdy, hi^u qua eua day hpe bang BTTH d khdi Idp TN ludn eao hon so vdi ldp DC Diem trung binh X eua Idp TN Id 7,14 eao hon ldp DC la 6,35, he sd bidn thidn d Idp TN Id 25,29 nhd hon Idp DC Id 28,5, didu chdng td dp phdn tan d ldp TN giam so vdi ldp DC Ti Id HS kidm tra dat loai trung binh va ydu kem cua Idp TN la 34,55 it hon so vdi Idp DC Id 55,36 Ngupc lai, ti Id HS eua Idp TN dupe diem trd Idn la 65,45%, d khdi Idp DC ehi dat 44,64% Dudng luy tieh d ldp TN ndm bdn phdi va phia dudi dudng luy tich ldp DC Dd khdng djnh kdt qua trdn la ngdu nhidn hay dp dung phuang "phdp thuc nghi?m, de tai tidn hdnh tinh dai 1,81 lupng kidm dinh tj va kiem dinh gia thiet: td cac thdng sd trdn ta cd td = 11,29 vdi mde y nghia a ^ 0,05, 1^= 1,96 Do do, td > ta chung td su khae gida X cda Idp TN vd X eua Idp ddi chung la cd y nghia thdng ke Diem trung binh eua ldp TN cao ban ldp DC khdng phdi Id ngau nhidn ma dp dung phuong phdp dayTN Nhu vay, viec xdy dung vd sd dung BTTH theo cdc bien phap de xudt dd to ehuc day hpe Sinh hpc 10 da budc dau dem lai hidu qua, giup eho HS cd khd nang tu logic, gdp phdn ndng cao khd nang ITnh hpi kidn thdc, khae sdu kien thde cho HS 3.1.2 Phdn tich dink tinh Vide su dung BTTH day hpe Sinh hpc 10 da cd tde dung tich cue hda hoat ddng nhdn thde, tao dupe thu eho HS hpe tap bp mdn Cu thd: Cae BTTH ndu da kieh thieh tinh tieh eye sang tao, tim toi eua HS HS ludn dupe ddt trang thdi ed van de ndn edc em khdng edn thu ddng tidp thu 117 S3 3(68) nam 2015 TAP CHi KHOA HOC DHSP TPHCM bdi hpc md trd ngudi ehu ddng tham gia gidi quydt tinh hudng dd linh hpi tri thde mdi Khi dupe hdi vd phuong phdp hpc tap dang thyc nghiem, da sd HS d ldp TN cho rdng: viec sd dung eae BTTH day hpc mdn Sinh hpe 10 giiip cdc em dd tidp nhan kien thue mdi vd ghi nhd sdu sdc ban Nhung didu lam cac em thda man hem chinh la ed dupe sy thd hpe tap Cac em nhan thay nhdng ndi dung cua van dk dupe gidi quyet rat cdn thiet va cd tinh thye tien eao Do dd, bdi hpe trd ndn gin gui vdi eac em hon Mdt sd HS khdc cdn cho rdng GV td ehde day hpe bdng BTTH, HS n h ^ thdy bdn thdn hpc duac nhidu didu hon nhu: cdch giai quydt mpt van de gap phdi hpc t^p, each khai thde ngudn thdng tin de giai thich van de, each trinh bdy vandd HS hoc Ip dupe kha ndng gidi quydt vdn dd d eac cdu hdi van dyng HS su dung edc thao.tde tri tue nhu phdn tich, so sanh, tdng hpp, khdi quat hda dd tra Idi cau hdi 3.2 Ket qud ddnh gid cdc ki ndng dgt dugc tir vi^c hgc bdng BTTH cua hgc sinh Trong TN day hpe bdng BTTH, chung tdi dd cd gdng tim each ddnh gid cac kT ndng cd dupe tu vide hpc bdng BTTH cua hpc sinh nhdm ldp TN didng qua kT ndng eo bdn dd dupe nghien euu Vi?c ddnh gid dupe thyc hidn qua bdi kiem tra bdng he thdng cac edu hdi ed chua dung npi dung can hdi lidn quan ddn kT ndng Thuc nghidm tren 190 HS 26 bdi d^y hpc kien thuc mdi d chuong chucmg trinh Sinh hpc 10 vd qua bai kidm tra ca qua trinh Uiyc nghidm Kdt qua thu dupe trinh bay d bdng Chdt lupng dinh tinh baf lam cda CO dugc^ tir vi^c hgc bdng BTTH ciia HS Bdng Kit qua ddnh gid cdc Id ndng Kk luan STT Kj nang Phat hi?n va nhan dang van d8 sinh tir BTTH Mvc dat diroc cua timg kl nang % Chua phat hi^n va nhan dang dugc cac van dl sinh MDI 0/2260 Phat hien va nh^n dang dirge rppt so yeu cau ciia BTTH MB2 230/2260 10,18 Phdt hien va nhan dang dugc dSy dii yeu cau ciia BTTH nhung chua bi6t Ii giai MD3 580/2260 25,66 554/2260 24,51 896/2260 39,65 miJc dp van dyng dugc: Phat hi^n va nhSn dang dugc day du MD4 yeu cau ciia BTTH va biet li gidli mot so CQ sa ichoa hoc C) muc dg vgn dune thuan thyc: MBS 118 SLd^t dmyc/tong so nghiSn ciru Phan Thi Thu HiSn TAP CHi KHOA HOC DHSP TPHCM Ket luan STT KInang MiTc dQ dat diTQ'c ciia tung ki nang SLd^t du^c/tong s6 nghien cuu % Phat hien va nhan dang dugc day du yeu cau ciia BTTH va bilt li giai ddy du ca sd khoa hoc Chua biet de xuat gia thuyet MDI So bp de xuat dupe gia thuyet nhung chua day du: Giai quydt MD2 De xuat cac gia dupe mpt so yeu cau cda BTTH thuylt (v6 kiSn De xudt dupe gia thuylt: Giai thuc cd lien quan, quyet dupe day dii yeu cau cua ve lap moi quan h? BTTH nhung chua biet li giai MD3 giua kien thdc co tuong minh gia thuylt Ii8n quan vdi y£u miic dp v|n dung dupe: Giai cdu cua vi^c giai quyet dupe day du yeu cau cua quylt BTTH, ve MD4 BTTH va bilt li giai mpt so ca sd hudng giai quyet khoa hoc BTTH) d miic dp v^n d\ing thuan thuc: Giai quyet dupe day dii y%\x cau MD5 cua BTTH va bilt li giai dSy dii ca sa khoa hpc 0/2260 650/2260 28,76 872/2260 38,58 563/2260 24,91 175/2260 7,74 Chua biet rut kit luan tu cac MDI minh chdng trinh bay 0/2260 Kit lu^ln chua hoan thi$n: Ket luan MD2 dugc mgt so yeu cau eua BTTH 438/2260 19,38 567/2260 25,09 864/2260 38,23 391/2260 17,30 Ket lu|n dupe day du yeu cau cua BTTH nhung chua bilt li giai mpt MD3 each tudng minh tren ca sd cac Bao cao va kiem minh chung djnh ket qua tir d miic dg v|n d\ing dupe: Ket luan yeu cau BTTH dugc ddy du yeu cau cua BTTH va MD4 bilt li giai mpt so ca sd khoa hgc chu yeu tu yeu cSu BTTH O miic dg v^n dung thuSn thyc: Ket luan dugc diy dii yeu cau ciia BTTH va biet li giai day dii ca sd MD5 khoa hgc tren co sd cac minh chiing neu Ghi chu:MD: muc dg 119 So 3(68) nam 2015 TAP CHi KHOA HOC BHSP TPHCM K6t qua bang cho thay: - VS IcI nang phat hien va nh^n dang vjn ii sinh; S6 HS bilt chic chSn, bi& mile van dung duoc, biet miic van dung thuSn thuc chiSm 89,82%, s6 HS biSt Idiong chjc chto chiSm 10,18%, khong c6 HS khong bilt phat hien va nhan dang vin Si sinh Nhu vay, da s6 HS biet phat hi?n va nhan dang van de sinh VS kT nang ik xuit cac gia thuylt (gia thuylt ve icien thuc co lien quan, gia thuylt thilt lap m6i quan he giOa kiln thuc CO lien quan vai yeu cau ciia vi?c giai quylt BTTH, gia thuylt hudng giai quylt BTTH): S8 HS bilt chic chin, bilt a miic v ^ dung dugc, biet cr miic dp van dung thuin thuc chilm 71,23%, s6 HS bilt khong chic chin chilm 28,76%, khOng CO HS khong biet de xuat cac gia thuyet Nhu vay, da so HS biet de xuat cac gia thuyet - Ve kit luan: S6 HS biet chic chin, biet o miic dp van dung dupe, biet a miic vjn dung thuin thyc chiem 80,62%, s6 HS bilt khong chic chan chilm 19,38%, khong co HS khong bilt kit lu^n Nhu vliy, da s6 HS bilt ket li4n vin dl 3.3 Bdnh gid cda HS sau day hgc Sinh hgc 10 bdng BTTH Qua phan tich, danh gii ket qua TN theo ca hai chi tieu dinh lupng va dinh tmh, chiing toi nit kit luan nhOng tac dpng su phpi theo m\fc dich TN ma chiing t6i dl buoc dau co hieu qua Tuy nhien, dl Idling djnh phuong an TN Ishong chi CO hieu qua dii voi viec hinh vk ren luyen kT nang giai quyet BTTH ma co tac dung tich cue dii voi vi?c nang cao chat lupng hpc t^p bp mon, ching toi tiln hanh thu thap y kien danh gia cua HS sau TN kit qua thi hi$n o bang Bdng Kit qud thdm ddy kiin ciia HS sau dgy hgc Sinh hgc 10 bdng bdi tgp tinh hudng Cau hoi dieu tra Cau Qu4 trinh hoc co sir dung BTTH, HS cam thay: - Rit thich - Thich - Khong thich Til? (%) 52,63 42,11 5,26 CSu HS nhan thay tac dung cua d^y hpc bing BTTH doi vdi ban than la: - Giiip HS ITnh hpi kiln thiic mod 92,63 - Phat trien tinh tich cue va tu sang tao - Ren luy?n kT nang van dung kiln thilc da hoc - Giiip HS hi kilm tta, danh gia viec ITnh hoi kiln thilc cua ban than 97,37 120 87,89 73,68 Phan Thi Thu Hien TAP CHi KHOA HOC DHSP TPHCIVI Cau hoi dilu tra Tile (%)' Cau HS tu- danh gia thai dp hoc t^p theo phirong phap day hoc bang BTTH cua minh theo cac npi dung sau: - Hirng thii hpc tap 96,32 - Tap trung chii y nghe giang 94,74 - Kien tri giai quylt BTTH 78,95 - Tranh lu|in s6i n6i 73,68 - Khong tham gia giai quyet BTTH 4,21 Ve vai tr6, tac dung ciia viec sir dung BTTH: Hau het HS cam thay rat thich va thich hpc theo each thiic (co toi 94,74% rit thich va thich, chi co 5,26% HS khong thich) Qua trao dii tr\rc tilp, li HS dua la khong dil thoi gian vi BTTH kho HS cung cho ring theo each hpc moi, cucmg dp hpc tap cao hon, thW gian hpc tjp it hon nhieu, truac day gio hpc mon Sinh hpc HS cam thay qua lau het gio vi phai nghe GV giang bai, bay gia hpc co sii dyng BTTH, HS cam thiy thai gian troi nhanh, luon ban khoan suy nghT, muon hoi, muon biet Ve tac dung ciia day hpc bang BTTH dii voi HS la giup HS ITnh hpi kiln thilc mai chilm 92,63%, phat triln tilth tich cue va tu sang tao ciia HS viec tim kiSm kien thiic mai chiem 97,37%, v ^ dung kien thiic da hpc de giai quylt BTTH chilm 87,89%, giiip HS hf kilm tra, danh gia viec ITnh hpi kien thuc ciia ban than chilm 73,68%i Trong qui U-inh giai quylt BTTH, HS co dip trao dii, tranh luan vl npi dung kien thiic CO ban, the hi^n vln hiiu bilt, kinh nghiem cua minh v l thai dp hpc tap ciia HS day hpc CO su dung BTTH: + 96,32% HS hiing thii hpc tap + 94,74% HS tap trung chii y nghe giang + 78,95%o HS kien tti giai quylt BTTH ' + 73,68% HS tranh luan soi nli + 4,21% HS khong tham gia giai quylt BTTH Chi CO 4,21% HS khong tham gia giai quylt BTTH Qua trao dii true tilp^ li HS dua khong tham gia giai quylt BTTH la khong du thoi gian, kho dl xuit cac gia thuyet Nhimg dai da s6 HS lai cho ring viec giai quyet BTTH da lam cho hp khong tiep thu kiln thilc li thuylt mpt chilu, hp phai tu luc tim toi kham pha tri thiic chinh cac BTTH, do hoat dpng nhan thilc cua hp tich cue, chu dpng hem €6 the noi ring, sil dung BTTH day hpc da thuc su giiip HS phat huy vai tro chii thi tich cue, chu dpng hpc tap, nghien cuu de chilm ITnh kiln thilc, ren luyen kT nang, kT xao Tom lai, viec su dung BTTH de to chiic day hpc Sinh hpc 10 bing BTTH da buoc diu dem lai hieu qua Vi vay, neu xay dung dupe he thong cac bai tap tinh 121 TAP CHi KHOA HQC DHSP TPHCM hulng CO chit lupng kit hpp voi phuong phap sii dung chiing phu hgp thi se dem Iji hieu qua cao day hpc, gop phin nang cao chit lupng hpc tap mon Sinh hpc 10 noi rieng va chit luang hpc tap noi chung o trucmg THPT Ket luSn Qua phan tich dinh tinh, dinh lupng kit qua thuc nghiem t^ truong: Trung hpc Thuc hanh thupc Truong Dai hpc Su pham TPHCM, THPT Nguyin Hiln va THPT Luong The Vinh vao nam hpc 2013 - 2014 cho thiy: chit lupng linh Sd 3(68) nam 2015 hpi tri thiic Sinh hpc 10 cua HS o khoi lop TN cao hon DC; kiln thiic Sinh hpc 10 ciia HS ITnh hpi dupe khong chi day dii, vOng chic ma bli duong dupe nang luc phat hien va giai quylt BTTH Tu cho phep kit luan: gia thuyet khoa hpc ciia dl tai dat la hoto toan diing dan, kha thi va hieu qua, la: day hpc Sinh hpc 10 trucmg THPT hSng BTTH se nang cao chat lupng day hpc bp mon va bli duong nang luc phat hien va giai quylt BTTH cho HS TAI U$U THAM KHAO Phan Diic Duy (1999), Sir dung bdi tap tinh hudng su phgm de ren luy$n cho sinh vien kjndng dgy hgc Sinh hgc, Luin an Tien sT, Truong Dai hpc Su ph^im Ha Npi Trin ^a Hoanh (2000), Phdt trien cdc phuang phdp hgc tap tich cue bg mdn Sinh hgc, Sach hoi duong thucmg xuyen, chu ki 1997 - 2000, cho giao vien trung hpc CO so, Nxb Giao due, Ha NSi Tran Van Kien (2006), Van dung tiep can gidi quyet vdn de dgy hgc di truyen hgc d trudng trung hgc phd thdng, Luan an Tien sT Giao due hpc, Truong Dai hpc Su pham Ha Npi (Ngiy T6a som nhin duQC bii: 22-12-2014; ngiy phin biin dinh gii: 15-3-2015; ngiychSp nhin ding; 23-3-2015) 122 ... tieh eiia Idp TN vd DC nhu hinh - too 90 - tich iO •3 -r in suat (%) ''0 ; 10 \ 10 -j — -•—TN / -•-OC H — 20 10 - a— 10 Bidm kidm tra Hinh Do thj dudng liiy tich ciia nhom lap TN vd DC tong hgp... 8,51 12,54 Trung binh (5-6) 25,51 42,09 Kha (7-8) 39,55 Gioi (9 -10) 25,9 29,82 14,82 Bang Cdc tham so ddc trung ciia nhom lap TNvd DC tong hgp Idn kiem tra Lop TN DC Cac tham $6 d^c trung X±m... 2014 cho thiy: chit lupng linh Sd 3(68) nam 2015 hpi tri thiic Sinh hpc 10 cua HS o khoi lop TN cao hon DC; kiln thiic Sinh hpc 10 ciia HS ITnh hpi dupe khong chi day dii, vOng chic ma bli duong