> Looping literally means every lesson you teach will be your first time teaching it. I don't think that's literally true, even if you're correct that looping

> Looping literally means every lesson you teach will be your first time teaching it. I don't think that's literally true, even if you're correct that looping for more than a year is suboptimal. A proportion of teachers are teaching a curriculum for the first time even "without looping" (i.e. looping for only a year). With two-year looping, teachers only take a year longer before they're teaching a curriculum they've taught before. Is there any advantage in looping for less than a year (e.g. changing teachers each semester)? What's the optimal amount of looping?