Never! It'sa crazy idea, and totally out of touch with reality (as per usual)!
I trained as a secondary teacher 'late', when our youngest started primary school- and loved my career, even though it was a times very stressful and exhausting. I stopped aged 55, but I just didn't have it in me anymore, physically and emotionally. I have great memories, and I think I was a fairly good teacher- but the thought of going back to it now, aged 63, fills me with horror and terror- truly.
Our Welfare State. Is it broken?