She told how a study by researchers Katie Ishizuka and Ramón Stephens - titled The Cat is Out of the Bag: Orientalism, AntiBlackness, and White Supremacy in Dr. Seuss's Children's Books - showed that kids as young as 3 can copy racial prejudices from the adults in their lives.
"After reading that I knew I had to do more than just model kindness and tolerance in my classroom," Richards told the Herald.
"My students have loved it! We talk about showing kindness every day. We've started learning about each other's cultures and we're reading books about people of different races. For example, we've read The Proudest Blue by Ibthija Muhammad and Moorhead by Selina Tusitala Marsh. These stories have sparked beautiful conversations about what makes us unique."
Richards says feedback from parents has been "incredible".
"I've received a few messages from parents saying that their children have come home and expressed that they feel seen, important and loved. It's encouraging for me to hear that the conversations that we have in class continue on at home."
After lockdown, when the kids came back to class, Richards says they were "bickering endlessly", but that she had seen a shift in the atmosphere after she started talking to them about kindness and tolerance.
"Our class has never felt so warm and joyful."
Richards says it's important to have conversations about race with young children.
"To me it seems far easier to raise anti-racist children than to reprogramme harmful racist behaviours later on in their adult lives."