·State functions of major parts (teeth) of the body.
Information for Teachers
·There are two sets of teeth in our life. Babies have milk teeth by the age of three. The set of permanent teeth completes between the ages of 17 to 21 years. Permanent teeth are of four types i.e. incisors (for cutting food) canines (for splitting food), premolars (for crushing and grinding food) and molars (for grinding hard food)
Charts of human teeth, textbook
Worm up Activity
·Ask the students if they can name different parts of their bicycle. Write students’ responses on the board.
·Tell the students that as the bicycle has many parts, our body is also made of many parts. These parts are called organs.
·Ask the students to name all the organs of body which they can see and touch. Write students’ responses on board.
·Make them focus that these are the external parts of their body e.g. ear, eye, teeth, and skin.
·Explain that like these external parts there are some parts inside the body which also perform variety of functions.
·Ask the students which part of their body works like a chopper.
(Expected response: Teeth)
·Ask each student to count the teeth of his/her friend. Ask them the number of teeth.
·Explain the concept of milk teeth and permanent teeth and ask the students:
—-Which sets of teeth you have? Milk teeth, permanent teeth or both!
(Expected response: Both sets)
—–What was your age when your permanent teeth appeared?
(Expected response: After 7 years of age)
·Tell the students that milk teeth are 20 in number while permanent teeth are 32 in number.
·Explain the basic structure of a permanent tooth (root and crown) by drawing it on the board and ask the students to see the diagram from book.
·Demonstrate the shapes and locations of incisors, canines, premolars and molars by using charts, pictures or drawing.
·Show the students a picture of full jaw in which all types of teeth are shown and ask to count the number of each type of teeth in the diagram.
·Prepare teeth card (like the one shown) to clear the types of teeth and reinforce students’ learning by asking them to locate incisors, canines, premolars and molars.
·Inform them that they will study further about the teeth in next lesson where they will discuss the common disorders of teeth and the importance of their hygiene.
Sum up / Conclusion
·There are two types of teeth: milk teeth and permanent teeth. Permanent teeth are of four types: incisors, canines, premolars and molars.
·Draw following table on the board.
·Instruct the students how to fill the table.
·They will explain their understanding by completing the table
Ask each student to choose one of the organs taught in this lesson. All students will make drawings of the chosen organs. They will also write the function of the organ