It doesn't really matter which course format you use - Topics would do just fine. It depends really on whether you want to hide the contents of the week you are not teaching them or whether you don't mind students seeing them. You could either just show everything,which is possibly best, or, if you think that would cause confusion, you could use Conditional activities to restrict access by date, so items in one topic section are only visible on the dates when you will need them. Or if the content depends on the group you are teaching, you could combine this with Groups and show them to just one group and not another.
Teaching with Moodle
Creating a course with two parallel time lines
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