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TEACHERS EXPERIENCES FORM

Title of the Experience
Collecting of rational numbers with equal sign (minus)
Name of the teacher
Marieta Andreeva
Country where it took place
Bulgaria
School typology
High Secondary School
Thematic Area
Maths
Experience typology
Teaching in class
Type of contact
Direct
Description of the Experience
The sum of two negative numbers is a negative number. Since students often get confused and feel difficult to remember one rule just said, in this case I try to persuade the meaning of the negative sign by using the example with the money. I tell them to imagine how they spend 3 lev for shopping and then how they spend another 8 lev. These are money they do not possess any more (sign ‘-‘).Eventually they have to collect the total amount spent (11 lev) which should be also with sign ‘-‘, because they no longer have it.

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