The best time to send back-to-school texts for more people to see and sign up is usually a few weeks before school starts. This gives parents and students enough time to think about their choices. It’s good to send texts in the evenings or on weekends when people are often using their phones. Also, it’s best to send texts between 9 am and 7 pm so you don’t bother people during their family time or when they’re not working. This way, you’re being polite and professional.