Lesson Plan of Bean & Maize Seeds General Science Grade V

                                                Lesson Plan of Bean & Maize Seeds

                                                    General Science Grade V

                                                      Students’ Learning Outcomes  

                                                              

·     

 

   Compare the structure & function of bean & maize seeds.

·         List the functions of cotyledons.

                                  Information for teachers

·         A seed is a small embryonic plant.

·         The outer covering of a seed is called seed coat (Testa) which protects the tiny plant within it.

·         The point where seed is attached to its stalk is called Hilum.

·         The small pore outside the seed, from where air and light enter is called Micropyle.

·         The part of seed which we can see after removing the seed coat is called an embryo.

·         The embryo is a small plant, having one or two cotyledons, which store food material.

·         The part of axis lying towards the pointed end of the seed through which first root arise is called radicle.

·         The part of axis lying toward the other end (opposite to pointed end) of the seed through which first shoot arise is called Plume.

·         A maize seed is an oval shaped and has one Cotyledon.

·         The bean seed is kidney-shaped and has two Cotyledons.

                                       Material / Resources

                 Flash cards / labeled pictures of bean and maize seed, textbook.

                                          Worm up Activity

Conduct a brainstorming session (based on Grade 1V learning) with questions like:

·         How does a plant begin its life? (Expected response: “plants grow from seeds”)

·         What is present inside a seed that it makes a complete plant?

Recall the students’ previous learning (unit 1; Grade V) and ask them.

·         How do the monocot and dicot seeds differ?

·         Draw diagrams of bean and maize seed on board and explain its different parts.

                                                          Development

     Activity 1

·         Divide the students into 2 groups.

·         Give soaked bean seeds to one group and ask them to note their observations in this table.

Characteristics	Observations
Shape
Colour
Size
Structure on outer surface

·         Give soaked maize seeds to other group and ask them to record their observations in this table.

Characteristics	Observation
Shape
Colour
Size
Structure on outer surface

  Activity 2

• Give soaked maize and bean seeds to each student.
• Ask students carefully remove the seed coat from the seeds.
• Ask; why a seed needs a ‘coat’
• Demonstrate the students how to look inside the seeds.
• Observe inside the seeds. Point out the radicle, plumule and cotyledons in seeds.
• Ask students to record their observations in the form of a table.
• Explain the functions of radicle, plumule, cotyledons and seed coat.

Seeds	Numbers of cotyledons	Radicle	Plumule	Micropyle	Seed coat
Bean seed
Maize seed

                                           Sum up / Conclusion

• A seed is a small embryonic plant.
• Its outer covering is called seed coat (Testa).
• The embryo consists of a radicle, a plumule and one or two cotyledons.
• The maize seed has one cotyledon while the bean seed has two cotyledons.
• Plant root arises from radicle. Plant shoot arises from plumule.
• The cotyledons store food material for the growing embryo.

                                                 Assessment

Ask following questions to the students:

    ----how many cotyledons are there in a bean seed?

   ----What is the function of micropyle?

  ----What do you observe on the external surface of the seed?

  ----Which part of seed gives rise to stem?

• Ask students to label the parts of the bean and maize seeds in the following diagrams.
• Involve the students in solving the questions given at the end of chapter / unit in textbook.

                                                       Follow up

• Ask the students to enlist name of seeds whose cotyledons are used as food?
• Collect different monocot and dicot seeds, preserve them in seed box or polythene bags and present them in front of the class.

Seeds
Monocot			Dicot
Maize seeds	Wheat seeds	Rice seeds	Beans seeds	Pea seeds	Gram seeds