Some Spanish parents are having their children boycott weekend homework in November, saying they get too much.

The CEAPA federation of 12,000 parental associations says the "No to Homework" campaign aims to encourage more family time between parents and children. It also argues that the homework system is outdated and doesn't improve learning.

But Education Minister Inigo Mendez de Vigo said Friday that the strike call undermines schools' and teachers' authority. He encouraged talks on the issue.

Other parent and teacher associations have criticized the proposed homework boycott.

The OECD's 2012 PISA study found that Spanish children and teenagers get 6 ½ hours of homework a week, above the near 5-hour average for some 40 countries studied.