Though she is a teenager now, Emma said "there are still difficult days like anniversaries or birthdays".
Emma volunteers with Cruse Bereavement Care to help other young people and has contributed to research aimed at helping schools to better support bereaved pupils.
The Marie Curie charity is calling for more training for teachers in how to support pupils who have lost a loved one.
For Emma, there are some subjects that bring back memories of her brother's death.
"Just recently we were learning about leukaemia and stem cell treatment. My Biology teacher was amazing," she said.
"She taught me what I needed to know and then after that she told me that I could just go for a walk and just take a breather."