C. Khai quat hoa, trim tugng hoa, dac biet hoa trong day hoc giai toan
t f MH •&g; f^ &g;
3.1.3. Bien ngi dgy hgc gidi todn(neu co the) trd thdnh cdc dgng tro ehai vu
ve, thoa mdi nhung vdn nhdm vdo muc tieu bdi dgy
Trong day bpc ndi chung vd day hpc gidi todn ndi rieng can trdnh sir don
dieu nhdm te, D I trdnh dan dieu thi phdi tao ra sir da dang. Mdt trong nhimg hinh thiie tao ra sir da dang Id bien npi dung day bpc gidi todn dudi dang trd choi. Tuy nhien, dl biin dupe ndi dung day hpc gidi todn thdnh dang trd ehai cd tinh chat thu gian md vdn dat dupe muc tieu day hpc thi ngudi day cdn phdi
cdng phu bdi trd ehai hpc tap ddi bdi chat che cdc yeu cdu sau day:
- Npi dung trd choi phdi hdp dan, phii hgp vdi lira tudi vd tao dugc cdm
gidc thii vi ddi vdi ngudi ehai.
- Trd ehai phdi hudng tdi muc tieu eua bdi day todn vd dam bdo thdi gian phii hgp.
- Khi da cd dugc ndi dung trd choi, ngudi gido vien cdn can phai cd nghe
thuat dieu khiln hpc sinh tham gia cdc boat ddng ehai vd nit kinh nghiem sau
mdi trd choi.
Mdt sd vi du minh hoa vl trd choi todn bpc
1. Tro ehai dodn so
- Giao vien dua ra ndi dung trd choi nhu sau: Mdi hgc sinh tu nghi ra mdt
vien can cu: vao keft qua ciia hpc sinh da dpc va ndi cho hpc sinh sd hpc sinh da nghL Cu th^: khi hpc sinh dpc ket qua la 272 thi gido vien cho biet sd hpc sinh nghi Id 26.
- - Gido vien dieu khien ca Idp ciing lam viec. Dieu quan trpng nhdt ciia gido
vien la giiip hpc sinh phdt hien ra cdch dodn ciia gido vien, biet gidi thich bdng ca sd khoa hpc cua viec dodn de tii dd cac em biet each xay dung cae trd ehai khac.
2. Tro ehai chia keo
Ndi dung: Tren bdn ed 3 dia keo, DTa thir nhat cd 7 cdi, dia thir 2 cd 11 cdi, dia thii 3 ed 6 cdi. Hay tim cdch san sd keo d cdc dia deu bang nhau vdi 3 ldn chuyen theo nguyen tac sau ddy:
-> f
- Chi dugc chuyen sd keo tir mdt sang mot dia khde
- Sd keo chuyen tdi mdt dia phdi bang sd keo ciia dTa dd hien cd
3,Tro ehai luon thdns cuoc
Noi dung: Cd 20 vien bi dat tren bdn, Cd hai ngdi choi bdc bi va timg ng-
udi bde mot. Mdi ldn, mdi ngudi chi dupe bdc khong qud 3 vien. Ai la ngudi
bdc
vien bi eudi ciing se Id ngudi thang cupc
Cach dieu khien : Gido vien gpi hai hoe sinh len choi vd eho cd lap theo
ddi de phdt hien cdch bdc bi ludn ludn cam chdc phdn thdng, Tir trd choi cu
the nay, gido vien ciing vdi hpc sinh xay dung len cdch bdc bi ludn thdng cupc vdi nhirng bdi todn tdng qudt.
4Trd choi thi tinh nhdm. hoac dien sdvdo 6 tron^
Gido vien cho hpc sinh thi dua tinh nhdm nhanh hoac quan sdt de biet
cdch dien sd vdo d trdng, Dieu quan trpng nhdt Id qua hoat dong ehai ndy, hpc sinh phdt hien ra vd gidi thich quy tdc nhan nhdm hoac quy luat dien sd de tir