For causal teaching, the course coordinator will specify your hours based on the sessional budget he/she is allocated.
However, if you are someone who is responsible and takes the role seriously (e.g., provides individualised feedback to assessments and cross-checks TurnItIn plagiarism percentages for potential academic misconducts in assignments etc.), expect yourself to be working at least 30 - 50% more hours (unpaid) depending on the cohort size and how efficient you are.
40 a week.
37 hours a week
Long and never ending
Standard and flexible