Kindness Post Office Postcards | Classroom Routines | Gratitude Writing | K-3rd

Looking for a simple, meaningful way to build kindness, gratitude, and positive communication in your classroom? The Kindness Post Office gives students an engaging, hands-on routine for writing friendly messages, noticing kindness, and strengthening their classroom community.

With ready-to-use postcards, sentence starters, a classroom mailbox, and easy weekly routines, students learn how to express appreciation, encourage classmates, and use their words to help everyone feel included.

Perfect for morning meeting, SEL time, counseling, writing workshops, or anytime you want to lift classroom morale through kind communication.

What’s Included:

• Kindness Post Office Setup Guide: Clear, step-by-step teacher directions for introducing the Post Office, modeling expectations, and launching your weekly kindness mail routine.
• Postcard Templates (12 Designs): A variety of kid-friendly postcards, including:
• Thank You
• You Made My Day
• You Can Do It
• Welcome
• Blank open-ended templates: Primary lines + regular lines included.
• Sentence Starters & Writing Support: A beautifully simple anchor chart that helps students write specific, meaningful messages without feeling overwhelmed.
• 20 Sample Kindness Messages: Ready-to-use examples you can model, display, or provide to students who need extra scaffolding. Supports emerging writers and encourages specific praise instead of vague compliments.
• Mailbox Labels and Mail Signs: Print-and-go labels to transform any bin or box into your classroom’s official Kindness Post Office.
• Weekly Routines Chart
• Lesson Plan: The Day You Begin: A complete K–3 SEL lesson based on the popular book The Day You Begin by Jacqueline Woodson—focused on belonging, noticing others, and using kind words to help classmates feel included.
• Mail Carrier Job Cards & Delivery Log: Build responsibility and leadership in a simple, kid-approved classroom job.

How It Helps

This resource helps students:

• Learn how to express kindness using specific, thoughtful language
• Strengthen empathy and social awareness
• Build inclusive classroom routines that make everyone feel seen
• Practice writing skills in a purposeful, meaningful way
• Develop a habit of noticing and appreciating others
• Foster a culture of encouragement and gratitude all year long

The Kindness Post Office becomes a favorite part of the week—students can’t wait to write, mail, and open their “kindness mail.”

Perfect For

• Grades K–3
• Whole-Class SEL Lessons
• Morning Meeting
• Writing Center or Workstation
• Small Group or Individual Counseling
• Kindness Week or Gratitude Month
• School Counselors, Classroom Teachers, and SEL Specialists

Why You’ll Love It

• Warm, community-building routine
• Easy to prep and easy to maintain
• Works beautifully with a wide range of SEL read-alouds
• Encourages authentic, child-friendly communication
• Fully supports SEL and writing standards
• Flexible enough for daily, weekly, or seasonal use

This print-and-go SEL + writing resource makes it simple to create a classroom where kind words are part of your everyday routine, and where every student feels valued, included, and appreciated.