Good Morning everyone !
Bright and not too cold this morning - but same as you, not very good prospect for days to come.
I was lucky and never had school food; I lived 10mns walk from the college which I attended for primary and secondary education, thus I had my meals at home; we did have one and a half hour break though, so quite feasible.
Primary education stopped with a Certificat d'Etudes - your Eleven +. Your O levels was our Brevet (and still is), and then A levels are the four years that lead to the Baccalaureat. (bacically)
Difference with you though is that for the Brevet, and in my days, we did not choose the subjects we wanted to take. It was a set program including two types of French (grammar and literature), Algebra, Geometry, History, Geography, Physic, Chemistry. Natural Science (Biology - the human body etc...) 1st foreign Language (studied for four years) and 2nd foreign language (studied for only 2years), Physical training, and I think that's all.
No way is it as difficult nowadays and in fact the Brevet now is only a glorified version of 11+ !
As for the Bac, it was divided into two parts, spread over two years, first part taken 2 years after the Brevet, and part 2 taken the following year. Choice of type of subjects for that though, either Maths, Science or Lit (but all having basic subject as well, including foreign languages. I think this also has changed now.