OPERATION ZERO TRACE — Digital Escape Room (Signed Integers: Add, Subtract, Multiply, Divide) Grade 7 · No-Prep · Single File · Works on all devices including Chromebooks 💻 THE MISSION: Students play as rogue hacker agents recruited by Dr. Elena Voss — a climate researcher whose data was stolen by a shadow organisation called the CIPHER BUREAU. Armed with an AI assistant named ARIA and a working terminal, students must breach five servers using their knowledge of signed integer arithmetic. Ever