shared three methods for efficiently sending reminders to students and parents. Another method is to use a Google Sheets Add-on called Add Reminders. Add Reminders will set-up your spreadsheet so that you simply enter reminder messages and email addresses then specify a date on which you want your reminders sent. The Add Reminders Add-on allows you to send the same reminder to everyone in your email list or you can send individualized reminders to everyone in your email list.
In the video embedded below I demonstrate how to use the Add Reminders Google Sheets Add-on.