This document describes a strategic intervention material created by a science teacher to help students better understand the challenging topic of photosynthesis. The material uses games, puzzles, picture analysis and other dynamic activities to make learning about photosynthesis more fun and help overcome difficulties students often have with traditional teaching methods. The material outlines the light and dark reactions of photosynthesis through diagrams, word activities, assessments and reference cards to reinforce key concepts and address the least mastered competency identified in photosynthesis.

1. Least Mastered Learning Competency Compare the light and dark reactions in photosynthesis. STRATEGIC INTERVENTION MATERIAL IN SCIENCE AND TECHNOLOGY II

2. Background of the Study Learning Photosynthesis is not as easy as A, B, C, especially if the materials are not available or the students forgot to bring the assigned materials. This SIM inspired material, the students will learn various ways such as games, puzzles and picture analysis. Learning is fun and dynamic with this Strategic Intervention Material.

3. Where’s my Food?

4. Guide cardWhat is photosynthesis? Students Note After reading this page I still do not understand Now I understand what the lesson is all about. What I think about the things to do. Easy Hard For this lesson, I want to study it Alone With one of my classmates. Within the group Plants, algae, and other chlorophyll-bearing organisms capture light energy and use it to produce food. This energy is passed on to animals that feed directly on plants or on other animals that have fed on plants. The entire process of capturing light energy to produce food is called photosynthesis. The equation is: 6CO2 + 6H2O + light chlorophyll (energy) C6H12O6 + O6

5. Photosynthesis is two stage process. Thelight reaction that took place in the grana of the chloroplast and the dark reaction that took place in he stromaof the chloroplast. In the light-dependent process, light strikes chlorophyll in such a way as to excite electrons to a higher energy state. In a series of reactions, the energy is converted (along an electron transport process) into ATP and NADPH. Water is split in the process, releasing oxygen as a by product of the reaction. The ATP and NADPH are used to make C-C bonds in the dark reaction. The photosynthetic process, in which food(sugar) molecules are formed from the carbon dioxide in the atmosphere with the use of ATP can occur in the dark as long as ATP is present. Remember….

6. Photosynthetic General Equation

7. What happens in photosynthesis

10. Activity card 1 Arrange the jumbled letters to produce a word. _________ 1. TAP- formed during light reaction. _________ 2. YGXONE- gas given off by plants. _________ 3. TRELECON- energized during reaction. _________ 4. AWTRE- splits into hydrogen and oxygen. _________ 5. LOPHYOLRCHL- traps light energy.

11. Activity card 2Study the diagram below and complete it using the words in the box.SUN Light energy Is absorbed by Energy carrier that becomes ENERGIZED CHLOROPHYLL that supplies energy to split add and p 2H to That are trapped by NADP (H acceptor) That is released ( energy carrier) forming forming That stores energy For use in the dark reaction

12. Word boxfor activity card 2 Water Oxygen NADPH2 Water Chlorophyll

13. Activity card 3 THE DARK REACTION The fixing of carbon in a carbohydrate Combines with A five carbon sugar in the chloroplast ( CO2 acceptor) That is gain used To combine with CO2 by combining and substituting H for a phosphate To form A very unstable and RDP That splits quickly and forms That can be used As nutrient or converted to H2O that is released As a by- product PGA, a 3-carbon compound and forms that combines with 2H supplied by NADPH2 from the light reaction ( energy supplied by conversion of ATP to ADP )

14. Word Boxfor Activity Card 3 PGAL 6 carbon sugar ADP 2 molecules Glucose Carbon dioxide

15. Check it out! Study the following illustrations below. Differentiate each stage of photosynthesis. Assessment Card 1 Students Note What I already know about this page? ______________________________________ What I learned from this page? ______________________________________ What I still want to know about this page? ______________________________________ What reactions occur? A B

16. Assessment Card 2.Self-checkEncircle the letter of the correct answer Which of the following reactions is also known as photo phase? a. Light dependent b. Light independent c. Anaphase Which of the following reactions is also known as synthesis phase? a. Light dependent b. Light independent c. Metaphase 3. What kind of energy is used to split two molecules of water? a. Light b. Proton c. Neutron 4. What is the energy source of the cell? a. NAD b. ADP c. ATP 5. What is made up of 5-carbon sugar and an important carbon dioxide acceptor? a. ATP b. RUDP c. PGAL

17. 6. Which co-enzyme capture the hydrogen molecules? a. NADP b. RUDP c. PGAL How many carbon, hydrogen, and oxygen are present in a glucose molecule? a. C6H12O6 b. C5H11O2 c. C12H6O12 8. What are the end product in dark reactions? a. ATP and NADPHb. sugar c. enzyme 9. In which part of the cell does light reactions take place? a. thylakoids b. stromac. stomata 10. In which part of a plant cell does dark reactions take place? a. thylakoids b. stroma c. stomata

18. Enrichment Card Sentence completion… The ___________ is the conversion of light energy into chemical energy. The light dependent reaction includes the conversion of __________ energy into electron energy, then into short-term energy storage __________. The __________ reaction involves the conversion of short-term energy storage to long term energy storage ___________. Students note What I already know about this page? __________________________________________________________ What I learned from this page? __________________________________________________________ What I still want to know about this page? __________________________________________________________

19. Spot the Difference

20. Reference Card Dela Cruz, Susana B. Biology ( Pheonix Next Century) Agar, Irene C. et.al. Science and Technology II Internet Explorer

21. Answer key Activity No. 1 1. ATP 2. oxygen 3. electron 4. water 5. chlorophyll Activity No. 2 Chlorophyll Water Oxygen NADPH2 ATP

22. Activity No. 3 CO2 6 carbon sugar PGAL Glucose ADP Assessment No. 1 Dark reaction or light –independent reaction Light reaction or light- dependent reaction

23. Assessment No. 2. 1. A 6. A 2. B 7. A 3.A 8. B 4. C 9. A 5. B 10. B Enrichment Card 1. Photosynthesis 2. Light 3. ATP 4. Dark 5. Glucose

24. Man’s pursuit to understand his body and all things around him is relentless. As a Science Teacher, we were tasked to gather data in as far as least mastered skills and competencies of the students in Science and Technology are concerned. I was obliged to teach Science and Technology II, or Biology from school year 2008-Present. During this period of time, I’ve made an observation that students have problems dealing with lessons particularly with the topic of photosynthesis, so I have reached a conclusion that students must not be taught traditionally. Aside from the fact that teachers nowadays serves as facilitators, we need to have follow up activities and an inquiry approach for much greater extent that can be done under the limitations imposed by the Basic Education Curriculum (BEC). And this I believed can be executed by using another version of my Strategic Intervention Materials (SIM). I started to use this technique on some grounds, and this has proven to be effective, especially when reproduced and handed out to learners with difficulties understanding hard topics in Biology.

27. Thank you….