If you want your students to automatically receive an email with their invoice each time they pay, you can easily enable this setting in your Stripe account.
Steps:
Log in to your Stripe account.
Either click this link: Stripe: Billing → Subscriptions and Emails
or manually access it by clicking the settings wheel at the top-right corner of your Stripe dashboard, then go to Billing → Subscriptions and Emails.
In the Customer emails section, activate the option “Send invoices to customers automatically.”
Save your changes.
Once enabled, Stripe will automatically email invoices to your students after every payment.