I hear you, teacher. Words do matter in this context. To be clear …
As mentioned elsewhere, I teach citizenship classes for people from other countries who seek to become citizens. Registering for the Selective Service is required of male citizens in the age range stated by law. It does not preclude exemptions, deferments, objections, nor does it automatically mean one is inducted into military service. If a draft lottery is instituted, it is an attempt at impartiality in the selection process.
If required to register with the Selective Service, failure to register is a felony punishable by a fine of up to $250,000 and/or 5 years imprisonment. Also, a person who knowingly counsels, aids, or abets another to fail to comply with the registration requirement is subject to the same penalties.