Lesson Plan -Vishnupriya.M

                                                                   LESSON PLAN

Name of the teacher: Vishnupriya.M                                     Name of School:C.M.S.H.S.Kattanam Name of the subject: Biology                                                  Standard: 9.A  , Str:20 Name of the unit: The sign of life                                             Date: 28/6/2014  Name of lesson: Presence of starch in leaves                         Time: 11.30-12.00

Curricular statement

 Students to develop factual,conceptual and metacognitive knowledge on the presence of starch in leaves as a result of photosynthesis through performing experiment,group discussion and lecture method and finally evaluation by questioning.

Content analysis:

New terms:

 Starch,ethanol,iodine polysaccharide,monosaccharide.

Facts:

Ø  Through photosynthesis plants prepares glucose molecules.

Ø  Glucose is a highly soluble molecule

Ø  Since glucose is highly soluble it cannot be stored in the leaves

Ø  Plants converts glucose in to starch.

Ø  Starch is a polysaccharide made up of the monosaccharide glucose.

Ø  Starch is insoluble in nature.

Ø  Plants yields energy from the breakdown of starch.

Ø  Animals also consumes this starch and under goes digestion to get glucose.

Ø  The presence of starch can be identified through iodine test.

Ø  If the leaf contains starch,it shows blue colouration when adding iodine.

  Concepts:

The product of photosynthesis is glucose.the energy required for all life activities are obtained through glucose.sine glucose is highly soluble it is converted in to starch and stored in the tissues.the presense of starch can be identified by iodine test.

Learning outcomes

Factual knowledge

Enables the students to develop factual knowledge about the presence of starch in leaves by recalling the new terms, facts and concepts mentioned in the content analysis.

Conceptual knowledge

Enables the students to develop conceptual knowledge about conversion of glucose in to starch and how to detect its presence through recognizing the color change in the leaf added with iodine solution.

Procedural knowledge

Enables the students to implimenting the experiment to detect the presence of starch.

Metacognitive knowledge

Enables the students to recognize the presence of energy products in our food products.

Process skills

To develop the skill in experimenting

 To develop the skill in observation

To develop the skill in communication through presenting in groups.

Attitude domain

Understanding the presence of starch in plant cells

Prerequisites

 The pupil are already aware that the final product of photosynthesis is glucose.

Teaching learning resources

Chalk board for listing out important points.

Referance

Text book of standared 9 by SCERT.

Teaching learning interaction

Class room interaction

Pupil response

Introduction The teacher ask the students some introductory questions as follows What is the final product of glucose? How glucose is stored in the plant cells?                 Activity 1 The teacher divides the students in to appropriate groups for collaborative and co-operative learning. They are asked to do the experiment to prove the presence of starch in green leaves and to write observation in the science diary. The experimental procedure is given below. Step-1 Pick a fresh leaf from a healthy green plant. Step-2 Put the leaf in boiled water for some time. Step-3 Take the leaf from the boiled water and put in to a dish containing ethanol. Step-4 Take the leaf from the boiled water and heat it until all the green colour disappears. Step-5 Then take the leaf out and put few drops of iodine solution in to it.observe the color change.    Write down the observation in the science diary. The starch present in the leaf cells reacts with the iodine solution and shows a blue color.this indicates that starch is the stored food material in the leaves. Activity-2 The teacher ask the students to list out some common plant products included in the food and to write answers for the following questions. What is the nutrient present in tubers? What is pulses composed of? Write an examples for lipid containing plant products? Which is the nutrient present in fruits? Which is the type of sugar present in sugarcane? The main product of photosynthesis is glucose.later it undergoes several metabolic process to form starch,protein,lipid etc. Review questions Which color indicates the presence of starch? Why glucose is converted to starch? Follow up activities Write down the procedure of starch identifying test in the science diary? Write down the reason why the leaf is treated with alcohol?

Glucose. In the form of starch. Blue colour appears in the leaf where iodine is added. Tubers,pulses,cereals,fruits,seeds,leaves. Starch Protein Oil Vitamins Sucrose Blue Since glucose is highly soluble in water it is converted to insoluble starch and stored in plant tissues.