Portfolios

I have attended to a teacher training seminar about "portfolios as a whole picture of self".The training took place at Carlos V Hotel, the talk was held by Lucrecia Prat Gay.
I found the seminar very interesting as I learnt the importance of portfolios to see the progress the students do.
Mrs. Prat Gay said" portfolios are pictures of product and progress, they include a carefully selected collection of student´s work that provides clear evidence of his/ her knowledge,skills and grasp of concepts in areas over a specific time".
She insisted on encouraging students to feel comfortable and to help them build a self- esteem because as teacher we should not forget that we are dealing with people.
One of the advantages of the students selecting items for their portfolios is that they develop a sense of what constitutes quality.
Another advantage of portfolios is that help students to take responsibility for their own learning by evaluating and reflecting on their work.
From my point of view portfolio are something that I would like to apply with my students but I do not know how yet.
All in all, I am open to all the new methodologies and strategies that may come and if somebody can help me with this issue , I would really appreciate it.