Ms. Gellar on Instagram: "Coming from a teacher in my 20s, year four, third school… I have heard every comment about my age, my energy, my passion, and my ideas. And here is what I have learned: shut the door. Not literally. I will listen, I will nod, I will say thank you, but I have shut the door on anyone telling me how I should feel about my job, my classroom, my life. I get messages from first year teachers asking how to keep going and how to block out the negativity. My best advice is that