Dd's day at the moment is something like this:
Session 1; Reading - they use work sheets, cards where they match pictures to the words, hand gestures that link to letter sounds
Break
Session 2: Gymanastics or swimming
Lunch
Session 3: Maths - again work sheets, colouring in, counting.
Session 4: Eveil - studying a theme, like medieval life, or nature, or where bread comes from
Other days there is Library, or computers, or crafts. Once a week they have Religious Studies where the class is split - eg Catholic, Islam - or "Morals", if you want to opt out.
There is no reading corner in the classroom this year, I noticed - there always was in Maternelle. They sit 2 to a desk, facing the blackboard. I don't think wiggling about is acceptable.
At 6 though, most of them will have done 3 years of Maternelle. They are used to being in the classroom And the "structure" gradually builds up over time, so 1st yr Maternelle - mostly playing and colouring, by 3rd Maternelle, they will have more "lessons" - counting, learning letters, how to write their name etc.
When they start Primaire, they are actually ready for formal learning. I actually prefer this system to the UK one where they are thrown in to school at 4 and have to get used to the environment, school dinners etc AND start reading/writing all at once.
Homework is maybe 20 minutes. A sheet of letters to copy, some reading words.
Dd's school day starts at 8.25. Lunch is 12.00 - 13.25. Day ends at 15:20, apart from Wednesday where there is no school in the afternoon, and Friday where class finishes at 14:20. As I work, Dd stays at the garderie til I collect her. This year they have homework club for 45 mins, then go to play.