This is a Clilstore unit. You can .
1. Introduction.
Vocabulary: Light, heavy, heavier.
Structures: I think that the best unit for___ is the___. Do you agree? Yes, I do / No, I don't. Because...
I think that the___is about/weighs around___. Do you agree? Yes, I do. / No, I don't. Because...
How many ___ are there in___?
2. How to create a weighing scale.
Make groups of 5 and create a balance. Click the link and follow the steps.
http://www.wikihow.com/MakeaBalanceScaleforKids
3. Metric System. Multiples and submultiples. Equalities.
Multiples. 1 t = 1000 kg. 1 kg = 1000 g. 1 hg = 100 g. 1 dag = 10 g.

Submultiples. 1 g = 10 dg. 1 g= 100 cg. 1 g= 1000 mg. 
1/2 kg= 500 g. 1/4 kg = 250 g 3/4 kg = 750 kg. 
4. Exercises.
Click the button below "weight exercises".
You can start doing exercises: change units of measure and solving problems.
Problem solving.
1. Copy essential information (datum).
2. Question.
3. Calculations. (Addition, subtract, multiply, divide).
4. Result. Express the unit of measure.
Structures: What is your answer for exercise?
Yes, I agree with you. / No, I don't agree with you. My answer is ___ because I ___ by and I moved the decimal point___ places to the___.
5. Do you want to play?
http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks2/maths/measures/index.htm
Short url: http://multidict.net/cs/4128