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TEACHERS EXPERIENCES FORM

Title of the Experience
Equations and simplifying of expression
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 equation is a mathematical equality, containing one or more variables. Solving the equation consists in finding the values of the variables which fulfills the equation. Variables are also called unknowns and values that fulfill the equation - solutions of the equation. In order to find solutions of the equation is often necessary the expression to be simplified (transformed). This simplification includes changing of sign of the variables when they pass to the other side of the equation. For students to remember that the sign of the variable should be changed when it goes to the other side of the equation I tell the students to imagine that they are themselves. When they are at home they wear certain clothes, but when they go out and want to visit someone or go to a restaurant then they change their clothes. It is the same with the variables which changing their place in the equation need to receive ‘new clothes’ or opposite of their sign.

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