It's "progress report time" at school, which means that we're required to post interim grades so parents and kids can see how they're doing in class.
Among other classes, I've taught pre-calculus (trig and analysis) for most of the 15+ years I've been at my current school. When completing progress report grades, I noted what I thought was a lot of D's and F's in my pre-calculus class, so I looked up past years' information. Sure enough, just as an example, last year I had only 1 D or F at the first progress report; this year I have 11. The contrast with other years is just as stark.
What happened? What's changed? I can't be sure, but this is the first year that pre-calculus students at my school had gone through so-called Integrated Math at our school as opposed to the Algebra 1-Geometry-Algebra 2 sequence. I don't know if that's the cause or not, but it's certainly a likely explanation.
I'm going to keep my eyes open on this one.