I am new to the site and don't know if this question exactly falls into the domain of this site.
We have a group of volunteers in our university who go to a school in a nearby village to teach. Some time back, one of our former volunteers who taught for a short period of time committed suicide.
The kids were a little acquainted with him and so after some discussion, we told them about the incident. Some of them couldn't remember who he was and demanded to see a photo. The next day when we went to them, they asked for the photo as if it was some kind of novelty. Sadly, we didn't have his photo with us. But what happened later truly horrified us. One of the girls started singing in a funny way something along the lines of "Suicide . . . suicide" and others laughed along with her. We did punish them by sending the particular student out of the class.
Now, we aren't sure how to explain to them why what they did was wrong and insensitive. The kids are in grades 6-8 or ages 11-14. If any of you can help, we would be truly grateful.
EDIT : A few weeks ago, we had put up a stall in the university festival to collect money in order to build a library for the kids. They were also there with us. The death of the volunteer occurred a few days before the festival and we have decided to name the library after him. So, this makes the situation worse because there is no point in naming it after him if they do not understand the reason behind it.