Verizon said it offered Remind a deal that would allow the company to keep sending free text messages to K-12 institutions and families, but Remind says it hasn't received an agreement in writing.

Teachers and parents are mobilizing against Verizon for imposing a fee that would disrupt a popular app teachers use to communicate with students.

Startup Remind has appointed Bleacher Report veteran Brian Grey its new CEO as the parent-teacher-student messaging app backed by Kleiner Perkins Caufield & Byers crosses 20 million users.