Maybe I'm being a bit PFB but this has really irked me.
DD is Y7 in a big academy secondary school. She showed me some work she had done - in three paragraphs there were six spelling errors and five grammatical errors. The teacher didn't mark up a single thing and just put big green ticks and irritating smiley faces on her work and wrote "excellent work" at the end.
But it wasn't excellent work. How is she going to learn if they don't flag this stuff up? Is this the norm these days? Doesn't bode well for GCSEs if so!!