Meet Teacher Ninja! Noone has a more important job than Teacher Ninja, leading and inspiring students to be the best they can be. When they ask about my dream, And what teaching means to me, I tell them that my greatest joy is helping them To be what they were meant to be. Life is hard! It's even harder for children who are just trying to figure things out. The Ninja Life Hacks book series is: Geared to kids 4-10+ Perfect for boys & girls Early readers Grades K - 6th grade and up Excellent resource for counselors, parents, and teachers alike Collect the entire Ninja Life Hacks book collection and box sets!.