Test students' ability to apply simple disposal rules by sorting common classroom and household items (paper, plastic bottles, food scraps, napkins, juice boxes, stickers, fabric pieces) into recyclable, compostable, or trash bins; require a brief, age‑appropriate justification for each choice and attention to contamination (e.g., food‑soiled paper, mixed materials). Suitable for Pre-K–Grade 2 using pictures or real objects.