Most schools and universities have site licenses. Before buying your own, check with your IT department or Math faculty to see if a serial number is already available for students.
When searching for "Cabri II Plus 1.4.5 serial number" or "activation codes" on third-party sites, you are likely to encounter several hazards: Cabri Ii Plus 1.4 5 Serial Number
Most sites offering free serial keys bundle their downloads with "keygens" or "cracks." These executables are notorious for containing Trojans, ransomware, or spyware that can compromise your personal data. Most schools and universities have site licenses