An acidic solution is any aqueous solution which has a pH< 7.0 ([H+] > 1.0 x 10-7 M). A basic solution is an aqueous solution containing more OH-ions than H+ions. An aqueous solution with a pH greater than 7.

Pedagogical aims:
to arise students’ interest in the topic and make them feel at ease with the new material
to acquaint the students with new vocabulary
to revise and extend students’ knowledge of reported speech
to give clear and comprehensible instructions for each activity
to develop students’ team spirit

10 minutes – create, in a graphic editor, an object then map the object so that it meets these properties
a) No fixed points and it is not congruent mapping
b) No fixed points and it is congruent mapping
c) One fixed point and it is not congruent mapping
d) One fixed point and it is congruent mapping

INSTRUCTIONS ON HOW TO USE IT:
This Excel game is to be used in Math classes as a help-to-understand tool for the students. It contains several types of functions (y=ax; y=ax2+b; y=a log x +b, etc), one in each sheet. The user will be able to choose a value for “a” and “b”, and the function will be graphically represented, always contrasted with the basic function of its type (y=x, y=x2, y=log x, etc), so that the student has a graphic approach to mathematical analysis.INSTRUCTIONS ON HOW TO USE IT: This Excel game is to be used in Math classes as a help-to-understand tool for the students. It contains several types of functions (y=ax; y=ax2+b; y=a log x +b, etc), one in each sheet. The user will be able to choose a value for “a” and “b”, and the function will be graphically represented, always contrasted with the basic function of its type (y=x, y=x2, y=log x, etc), so that the student has a graphic approach to mathematical analysis.

DESCRIPTION & PROCEDURE
The students will carry out an end-of-term project using audiovisual support. First, they will have to select a scene/ several scenes from a famous film. The students will adapt the original dialogues to their own interests, including the grammar points that have been mastered all along the academic year. The scene is to be recorded with a camcorder/ cell phone/ digital camera or any other audiovisual tool. The recorded images will be edited and must include simple credits.

Objective of the activity is to determine the quality of water samples of different sources using chemical and microbiological indirect methods. The action has planned activities in the laboratory of Chemistry with the determination of the presence of the organic substance, as an indicator of contamination, through the method of Kubel and in the laboratory of Microbiology with the determination of Total Coliforms with MPN method.