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5.2) Principle II: Enhancing Grade 11 Students’ Understandings about Advanced Photosynthesis Concepts 5.2.1) Mrs. Amp’s Practices on Principle II 198 Mrs. Amp was not confident in her content knowledge. Also, the school events and public holiday took over the teaching periods from her. She appeared to use reading homework to enhance the understanding of advanced photosynthesis. She neatly distributed all worksheets and all copies of the teaching transparencies to the students. Also, she spent the final two periods for formal lecturing all concepts about photosynthesis. There was no discussion, concept mapping, game, experimentation, cooperative learning and problem solving in the classroom. S09, S10, S11 and S12 obviously supported that “…the teacher usually told the concepts to us…and the students followed her by writing.” “There had not much activity.” The findings indicated that the teaching weakly enhanced the understanding of advanced photosynthesis. 5.2.2) Students’ Understanding about Advanced Photosynthesis The survey indicated that a majority held partial understanding with misconceptions about the dark phase. Also, they held partial understanding about the light phase and structures and functions of chloroplast. As well as, they had no ideas about the necessary factors affecting photosynthesis rate. Only twenty four percentages, one quarter students, fully understood about light independent (dark) phase. Plants fix CO2 to produce food. On the other hand, a majority, thirty two percentages, held partial understanding with misconception. They thought that the dark phase was particular process of producing food in night; that the dark phase was producing C6H12O6, O2 and O3; and that the dark phase took place after ATP was used to produce O2 and sugar. Eleven
percentages misunderstood that the dark phase was plants’ respiration releasing CO2. Also, twenty three percentages had no idea about the dark phase. A majority, fifty percentages, held partial understanding about light dependent (light) phase. They understood that light supplied energy to activate electron, but they forgot to describe photolysis of water. Nobody had full understanding. A minority, thirty three percentages used the misconception about light energy to describe the light phase. They thought that sunlight supplied its heat to separate water and electron. Nobody developed sound understanding (SU) about structures and functions of chloroplast. Forty nine percentages, a majority, held partial understanding that chloroplast had only chlorophyll. A minority, thirty five percentages had partial understanding with misconception that chloroplast could directly absorb light without chlorophyll. In terms of the relationships between the necessary factors affecting photosynthesis rate, only five percentages had full understanding. They understood that numbers of chloroplast and type of plant leaf tissues affected to photosynthesis rate. However, forty one percentages, a majority, had no advanced ideas about the relationships. They broadly described that different type of plants differently fixed CO2. A minority, thirty percentages had just partial understanding that CO2 fixation of C3 plants was different from C4 plants, but they could not describe what the difference was. 199 The survey, observations and individual interviews with students, S09, S10, S11 and S12, did not indicate that the students developed the understanding. They appeared to hold some misconception, after teaching. S09 who disliked teaching by rote learning could not develop scientific understanding about photosynthesis. The misconceptions about structures and functions of chloroplast, light phase, dark phase and necessary factor affecting
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THESIS CASE STUDIES OF TEACHING AND
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TABLE OF CONTENTS Page LIST OF TABL
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TABLE OF CONTENTS (CONTINUED) iii P
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TABLE OF CONTENTS (CONTINUED) v Pag
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LIST OF TABLES Table Page 2.1 Struc
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LIST OF TABLES (CONTINUED) Table Pa
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CHAPTER I INTRODUCTION This chapter
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led to improvement in the promotion
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water worked as food transported wi
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suggested peer collaboration for hi
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chloroplasts and pigments, the ligh
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would like to develop a new teachin
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concepts, such as absorption of lig
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conceptions, the scope of biology e
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3, and 8. In Grades 11-12, the scie
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Table 2.3 Basic Science Content Sta
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Table 2.3 (Cont’d) Contents Conte
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light energy and chlorophyll 2 H O
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2. Photosynthesis Itself Plants, al
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of chlorophyll. The students believ
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Up to this point, those previous st
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partly because of the biology educa
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(Matthews, 1997: 6). Philosophicall
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understanding capability of environ
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4. Social Constructivism The Russia
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5. Constructivist-Based Teaching ab
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peers, while the control group work
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generation to the next” (Cobb and
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2.1) Thai Living Styles Thailand is
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focuses prepare them to take the Na
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culture. First, Thai existing views
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Third, the nature of science is the
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democratic view, that the understan
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4. Summary: Integrating the Nature
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elationship between one concept and
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Brown (2003) used a combination of
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Focusing on thinking and encouragin
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Which aspect of the nature of scien
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teaching photosynthesis needs impro
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− encouraging students to partici
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The attempt to understand and inter
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Figure 3.1 Research Design of the T
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was considered to differentiate the
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2.1) Teacher Preparation for Implem
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3. Evaluating Impacts of Photosynth
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Figure 3.2 Survey Developmental Pro
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1.2) Advanced Photosynthesis Survey
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1. accessibility - is enabling the
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implementation of the teaching inte
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Table 3.4 Data Collection Program S
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students. The learning culture in t
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1. Surveys: Content Analysis Conten
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They were confirmed by the teachers
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CHAPTER IV THE PHOTOSYNTHESIS TEACH
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structures and functions of chlorop
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Therefore, this study focused on us
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from constructivism to socio0cultur
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Sub-stand 1: Living Things and Livi
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stroma. 5.3) Lists of Concept Propo
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c) Light independent (dark) phase
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Figure 4.1 Photosynthesis Concept M
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Lesson 1 ‘Plant food’, aimed to
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Lesson 5 ‘Light independent (dark
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Table 4.1 Photosynthesis Lesson Pla
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Table 4.1 Cont’d Lesson 3. Struct
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Table 4.1 Cont’d Lesson 5. Light
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Table 4.1 Cont’d Lesson 6. Studen
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After the researcher finished devel
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per a week, namely two 60-min perio
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always asked what she really did no
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schooling studying, she studied Phy
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B = blackboard C = instrument cupbo
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Forty nine percentages had partial
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for photosynthesis. Only seven perc
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Table 5.3 Correcting the Introducto
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Mrs. Engka: Right (confirmed). You
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structures might be a metaphor of u
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Table 5.4 Advanced Photosynthesis C
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In her planning for the nature of s
Page 161 and 162: participating in role play discussi
Page 163 and 164: 5.4) Principle IV: Enabling Student
Page 165 and 166: inside and outside teaching period.
Page 167 and 168: Activities 5.6) Principle VI: Encou
Page 169 and 170: 6. Summary of the Border School In
Page 171 and 172: 2. Background Information about Mr.
Page 173 and 174: Table 5.7 Mr. Vyn’s Students Sele
Page 175 and 176: Mr. Vyn had his own style of teachi
Page 177 and 178: 5. Mr. Vyn’s Implementation of th
Page 179 and 180: Mr. Vyn: …No. 4…mineral is plan
Page 181 and 182: The misconception that CO2, mineral
Page 183 and 184: Although the students incompletely
Page 185 and 186: model of chloroplast structure base
Page 187 and 188: undle-sheath cells. Both cells cont
Page 189 and 190: Table 5.9 Advanced Photosynthesis C
Page 191 and 192: However, there was no discussion ab
Page 193 and 194: change in term of application of ol
Page 195 and 196: 5.4) Principle IV: Enabling Student
Page 197 and 198: discussion. “The teacher always d
Page 199 and 200: photosynthesis e.g. dark phase. Als
Page 201 and 202: 2. Background Information about Mrs
Page 203 and 204: Table 5.12 Mrs. Amp’s Students Se
Page 205 and 206: laboratory activities and concept m
Page 207 and 208: misconceptions about plant food, pa
Page 209 and 210: The misconceptions about plant and
Page 211: Table 5.13 Correcting the Introduct
Page 215 and 216: Table 5.14 Advanced Photosynthesis
Page 217 and 218: One conception about science demand
Page 219 and 220: Table 5.15 The Nature of Science of
Page 221 and 222: Not only relating photosynthesis kn
Page 223 and 224: the book and summarized the concept
Page 225 and 226: Cross Case Studies: Implementation
Page 227 and 228: In case of the teachers e.g. Mrs. A
Page 229 and 230: students’ own views about plants
Page 231 and 232: CHAPTER VI SUMMARY, DISCUSSION AND
Page 233 and 234: 5. The students’ understanding of
Page 235 and 236: learning participation rarely appea
Page 237 and 238: the students to understand the rela
Page 239 and 240: the science project for environment
Page 241 and 242: ecause old knowledge was reinterpre
Page 243 and 244: Table 6.2 Learning Activities Sugge
Page 245 and 246: understandings about the light inde
Page 247 and 248: Therefore, this research suggested
Page 249 and 250: Amir, R. and P. Tamir. 1995. Propos
Page 251 and 252: Bell, B. 1998. Teacher development
Page 253 and 254: Campbell, N. and J. Reece. 2002. Bi
Page 255 and 256: Duit, R. and D. Treagust. 2003. Lea
Page 257 and 258: Govindjee, J., T. Beatty, and H. Ge
Page 259 and 260: Institute for the Promotion of Teac
Page 261 and 262: Lin, H. and C. Chen. 2002. Promotin
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Merriam, S. 1988. Case Study Resear
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Patton, M. 1990. Qualitative Evalua
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Smith, M. and L. Scharmann. 1999. D
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Von Glasersfeld, E. 1995. Radical C
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APPENDIX A: INTRODUCTORY PHOTOSYNTH
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1. Tick any of these items which ca
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6.5) Plants need carbohydrate for t
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APPENDIX B: ADVANCED PHOTOSYNTHESIS
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5. Tick any item (s) which you thin
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12. Here is a statement about plant
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