Teaching objectives?1 so that we know the common unit of land area - hectare, learn to measure the land area, know how big is 1 hectare.

2. To master the rate of progress and unit conversion between land area units.

3.

3. Cultivate the good habit of using your hands and brain, and guide you to love life and pay attention to every thing around you.

The focus of teaching? Master the square meters, hectares of simple conversion between

The teaching difficulties? Master the simple conversion between square meters and hectares

Teaching aids Learning aids? Pictures

Teaching methods? Lecture method Practice method

Time? One lesson time

Pre-learning?How big is 1 square meter 1 square decimeter 1 square centimeter? How to describe

Lesson 1

Teaching process? Teacher activities? Student activities? Second preparation

I. Create a situation to introduce the hectare?

1., Teacher: students, we have learned what common units of area?

2. . Who can say 1 c ㎡? 1d㎡? and 1 ㎡ are how big respectively?

3. Show the class: what unit is appropriate to fill in?

The area of a postage stamp is about 8 (? ); ?

The area of a classroom desktop is about 24 (?);? ); ?

The area of the classroom floor is about 72 (?). ).

4. Question: Has anyone in our class been to the Bird's Nest in Beijing? What was your first feeling when you saw it? Is it big? And do you know what is the area of the Bird's Nest?

Students discuss what unit of area should be filled in

Division: It seems that the original learned unit of area is obviously not appropriate, need a larger unit of area than the square meter in order to be expressed. Today we will recognize a unit of area commonly used in measuring land area - hectare. The board book