This page will collect the contributions of the teachers who have used the unit, in total or in part in the classroom.Initially, it just contains a few "teaching suggestions", which we could call "theoretical", although they are based on our teaching experience.

The work with "Electrical phenomena" in the classroom will, no doubt, be the source of more valuable contributions. The aim of this teaching unit is to provide an introduction to the concept of the electric field. It begins with some references to electrification and ends presenting the movement of a particle between two points in an electric field which have a difference of potential. The unit is organized around the following points:

• A qualitative description of the phenomena of electrification, electrostatic attraction and repulsion and an introduction to the concepts of electric charge, insulators and conductors.

• A justification of Coulomb's Law and the calculation of the force exerted by one or two charged particles on another.

• A justification of the concept of field intensity and the calculation of its value for the case of one or two charged particles.

• A description of the electric field using lines of force.

• A justification of the concepts of potential electric energy and potential, and their use in the calculation of the work carried out to move a particle in the electric field.

• An observaton of the relation between field intensity and potential.

• Some predictions about the movement of charges in uniform fields.