January 21 to 25th is No Name-Calling Week, a national campaign aimed at combating bullying in schools. The resources page features links to lesson plans for elementary, middle school and high school students. There are also art lessons and promotional materials.
None of these activities are specifically targeted towards language learners, but many could be easily adapted. At my school, we’ve had several issues with bullying over the past couple of years, so this would be extremely relevant for our students.