For a week, strange things happened in class 6C. Every day at the big break, somebody's sandwich disappeared from the bags near the open window.
At first, the students blamed each other. Tom said it was Oscar, because Oscar was always hungry. Oscar was very hurt. "I didn't take anything!" he said.
Maya decided to solve the mystery. On Thursday she hid behind the door during the break and watched the bags. After a few minutes, a big black crow landed on the window. It jumped into a bag, took a sandwich in its beak and flew away to a tree.
Maya ran to tell the class. Everybody laughed, and Tom said sorry to Oscar. From that day, the class closed the window during the break.