The experiment was made successfully but I found a little drawback, we could not get everyone involved.
I realized that only three students were interested in the activity, two just watched and one was in another world.
We needed to ask some questions which were the clue so they could achieve the goal, for the fist clue all the group was involved and they could get it because of an apriory knowledge which they have experience last year on a electronic class, and with that clue Quetzali could choose the correct material, then just she and two students were trying to turn on the LED, I think that if Quetzali would not be there the students could not achieve the goal because despite they had the apriory knowledge they could not join the previous experience (know and experience how a LED turn on and what is that thing which permit turn it on) with the materials they had, Quetzali told to her classmates: "the motor can generate energy, because of that a motor moves things" and afther all of them, except one, began to tell Quetzali that connected the LED and it turn on, once achieve the goal we asked to twisk the motor bakwards and they note that the LED did not turn on, Jonathan saw that the metalic part of the LED stick to the motor and asked us if the motor had magnets (he knew that a magnet attracts metals because he had an experience), we answered yes and Quetzali said: maybe is because of the polarity.
They could construct the new knowledge (a motor can turn on a LED) because of previous experiences, so that is the reason of why we consider that this was a way of constructivism.
