Barcelona host a large variety of film schools, although the film school industry was hit hard between 2011 and 2013 due to the financial crisis and saw several institutions closed (most notably CECC). Schools are not only a great place to learn skills, but also good places to look for crew and do networking. The following schools currently offer classes, workshops and masters degrees in the Barcelona area:
http://www.auladeescritores.com/guioncinematografico.htm (screen writing)
http://www.afilm.es/ (based in Sitges)
http://www.claquetayaccion.com (Based in Villanova i Geltru)
http://www.eldoblaje.com/escuelas/escuelabarcelona.htm (school on dubbing)
http://www.freewebs.com/actorsworkshop/barcelona.htm (Acting in English)
http://www.moveo.cat/eng/ (Mime school)
The Portugal based Fest Film Labs organizes workshops with Oscar nominated or other award winning film professionals throughout Europe, including in Barcelona.