Lesson Plan of Life Cycles of Frog
General Science Grade IV
Students’ Learning Outcomes
· Draw and label key stages in the life cycle of a frog.
Information for Teachers
· A living organism passes through a series of changes from its birth to the time it produces its next generation. This series of changes is called the life cycle of organism.
· In many animals like frog, butterfly etc. the eggs don’t hatch directly into young ones. First, the egg hatches into larva and then the larva grows into new animal
· The female frog lays eggs in water and the male frog fertilizes the eggs. After some days, each fertilized egg hatches into a fish-like larva. The larva of frog is called the tadpole. It does not have legs but has tail for swimming. When it grows, its legs are formed and it looks like a little frog. The tail also starts disappearing and the tiny frog grows into adult.
Material / Resources
Pictures of egg, Chick and hen, posters / pictures of the life cycle stages of frog, butterfly, textbook
Worm up Activity
· Show the pictures of egg, chick and hen (if available) or otherwise write the names (egg, chick and hen) on the board.
· Ask students to point out the sequence of stages present in these pictures.
· Ask, “Can you describe the stages of your life”? Guide students to compare the above mentioned stages with the stages of their own lives i.e. toddler, teenager and adult.
· Discuss the term “life cycle” with the students
Life Cycles of Frog Development
Activity 1
· Ask the students to recall what they have learned about the stages of life of a hen.
· Ask: have you ever seen a frog? Do you know how it develops? How does it look like when it is a baby? Ask them to imagine what a tiny frog looks like and draw a picture.
· Discuss with the students the sequence of events that must occur before a frog develops.
· Inform them that first there are tiny eggs that cling together in the water. Draw on the board a simple diagram of tiny eggs in a pond.
· Explain that larva, called tadpole, comes out of the egg and then swims in the pond. Draw the line-drawing of a tadpole on the board. Ask them to compare their own drawing of a baby frog with that of the tadpole.
· Inform the students that the tadpole develops legs and lungs and changes into a frog. Draw a simple drawing of an adult frog next to the tadpole.
· Ask them to see the drawing from the book for better understanding of the life cycle of frog.
· Divide students into groups of 4-5. Give each group a piece of white paper that is labeled with a particular stage (egg, larva, or adult) in the cycle. Ask them to draw the written stages.
· After the students have made the diagrams of their part, call one member of each group to the front of the class.
· Ask the students to arrange themselves in the sequence of the life cycle.
Sum up / Conclusion
· A living organism passes through a series of changes from its birth to the time it produces its next generation. This series of changes is called the life cycle of organism.
· In the life cycle of animal like frog, larva is produced from eggs.
Assessment
· Ask the students to write in circles the number of the stages of frog’s life cycle and to write of the names of the stages.
· Draw a line-diagram on board and ask the students to identify the life cycles and labels the mentioned stages. Ask them to draw the missing stages, too
Follow up
· Ask the students to link the characteristics given below the diagrams of frog.
