Generally:
* Elementary school (école primaire): Homework is relatively light or non-existent in the early years (CP, CE1). As they progress, it gradually increases, but it's usually meant to be manageable and shouldn't take more than 30-45 minutes per day. Reading is often emphasized.
* Middle school (collège): Homework becomes more significant, with several subjects requiring assignments and preparation. The amount can vary considerably depending on the student's workload and the teacher's expectations. Expect at least an hour or more per day, potentially more depending on the student.
* High school (lycée): Homework is substantial and often requires significant independent study and preparation for exams. The workload can be quite intense, especially during exam periods, potentially requiring several hours of work per day.
It's important to note that French education also emphasizes classroom learning, and homework is generally seen as a complement to, rather than the primary source of, learning. While the quantity of homework can seem high at times, particularly in secondary school, the focus is typically on quality and understanding rather than sheer volume.