The document discusses teaching young learners in mixed ability classes and some of the challenges that come with it. It lists common problems such as some students finishing activities quickly while others take more time, stronger students dominating, and not knowing how to level activities for different students. It then provides some advantages and disadvantages of mixed ability classes. Finally, it gives suggestions for how to plan a mixed ability lesson such as establishing eye contact, nominating students, asking easy questions, and balancing different types of activities.