Google announced the addition of some new features to Google Classroom. One of the features teased in that announcement was an option to distribute a "join link" that can be used in place of sending an email invitation or having students use a "join code" to join your Google Classroom. The option to use "join links" is now widely available in G Suite for Education.
The new "join link" feature and two other options for students to join your Google Classroom are demonstrated in my new video that is embedded below.
Applications for Education
Depending upon the age and skill of your students, the "join link" might be the quickest way to get students into your Google Classroom. You can distribute the link through a variety of means including texting it via Remind for students and or parents to use at home.