How do you understand "call in orders" in this sentence? EDGEWOOD-Every morning at Dixie Heights High School, customers pour into a special experiment: the district's first coffee shop run mostly by students with special learning needs. Well before classes start, students and teachers order Lattes, Cappuccinos and Hot Chocolates. Then, during the first period, teachers call in orders on their room phones, and students make deliveries. They learn not only how to run a coffee shop but also how to deal with their affairs. They keep a timecard and receive paychecks, which they keep in check registers. teachers call in orders on their room phones 1. Does it mean teachers call the coffee shop to make orders using the phone in their classroom? 2. If so, is "call in" a phrasal verb? They keep a timecard and receive paychecks, which they keep in check registers. 3. What is a check register?