Abbott Elementary can help advanced learners become more confident with fast and natural English. Some conversations move quickly, so learners may need to listen to certain parts more than once at first. The language mixes everyday English with a few expressions that need attention, so it works best for learners who already have a solid base. Following the story requires attention, so language difficulty is not the only challenge here. If your English is near C1/C2, this can be useful practice, especially if you start with English subtitles.