Slide No-01: Teachers manual.Slide No-02 : Introduction Class, Subject and Chapter.Slide No-03 : Presented by Biplob Kumar DasSlide No-04 : Learning result.Slide No-05 : Picture display.Slide No-06 : Declaration title of the lesson.Slide No-07 : Teachers discussion.Slide No-08 : Introducing parts of electric bell.Slide No-09 : Teacher explanation mechanism of electric bell.Slide No-10 : Video display elaborated and with sound.Slide No-11 : Individual work. Slide No-12 : Group work.Slide No-13 : Feed back.Slide No-14 : Home work.Slide No-15 : End the class and Thank you all.

Teachers manual

Class: Nine General science Chapter: 14 Class time : 45 minuets

Electric Bell

Biplob Kumar DasM.Sc, M.Ed

University of DhakaAssistant teacher (science)

Sammilani Institution, Jessore

1. Students will be able to define the Electric bell.

2. Students will be able to explain the functions of the parts those take part in the Electric bell.

3. Students will be able to tell the use of Electric bell.

What have we seen in this pictures ?

Title of the lesson

Electric bell.

Define electric bell and its mechanism. Explain the parts which take part in the electric bell. Etc.E

( Teachers discussion )

Electric bell consists of the following parts.

Horseshoe type iron

Copper coil

Iron hammer Spring Screw

Gong

Mechanism of Electric Bell

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Click here to see video

1. What type of magnate use in electric bell?2. What is relation between spring and magnate.

Individual work

Group work

You are five groups and discuss the matter

Write down the name of the parts that take part in the electric bell .

Tell the name of following parts?

1 2

34

Home workExplain functions of electric

bell.