VÍDEOS PREPARATORIOS PARA GRADO SEPTIMO

VIDEO 1

http://www.youtube.com/watch?v=w1XQZAGZ4D4&feature=related

VIDEO 2
http://www.youtube.com/watch?v=ZPWtPDTW4qY&feature=relmfu

VIDEO 3
http://www.youtube.com/watch?v=v-QQVb6QDnQ&feature=related