Ok, now you are talking about 4th grade which was 31 years ago! Let’s be honest: before this post, when was the last time you had a reason to use a Venn diagram (and helping your kids doesn’t count)? Nice graphics, by the way. I suspected that’s what a Venn diagrams was, just for the record. A lot of cobwebs and alcohol have replaced stuff like that in my brain, though.
Probably a couple of years ago... but I'm probably an anomaly.