I'm Dan and this is my blog. I'm a former high school math teacher and current head of teaching at Desmos. He / him. More here.


  1. I’m so sorry Dan, my deepest condolences. My own father passed away a year and a half ago and I can speak honestly here. You know that saying that “time heals all wounds”? It’s b******t. Whenever I am reminded of my father, I still cry.

  2. The saddest, most beautiful bar graph I’ve ever seen. Your dad must have been very proud of you.

  3. poign·ant / ˈpoinyənt / Adjective
    1. Evoking a keen sense of sadness or regret.

    My condolences.

  4. I understand how this just overshadows an entire year. My graphs would show 100% increases in a job, home and a car. But the decline from losing my grandfather this year is the only statistic that seems to matter. Thank you for sharing this.

  5. I’m so sorry, Dan. I’m truly saddened for you. Thank you for the thoughtful post. Even at such a tough time as this, you allow us, your thousands of followers, a peak into the humanity of your world. You continue to inspire.

  6. Heart-wrenching. I am so sorry for your loss. This is a beautiful tribute to how much he meant to you.

  7. Dan, I didn’t know your father, but I wrote a haiku about mine. Hopefully it works as well for one who has gone as for one who is still here.

    There’s no-one like him
    He’s always been there for me
    Thank goodness for Dad

    My condolences.

  8. Dan,

    Your dad must’ve been a cracking guy to have raised such an inspiration. Thanks for all your ideas- checking out your previous annual reports has motivated me for kicking off 2011!


  9. So sorry to hear this Dan.

    I’m genuinely amazed that you can use a bar chart to such perfect effect at such a time. I don’t think I’ll ever forget this diagram.

    Peace to you and your family.


  10. Janice Stearns

    January 2, 2011 - 5:54 pm -

    So sorry for your loss. I lost my mom in November. It’s hard. The graph was so perfect. My thoughts are with you and your family.

  11. Please accept my condolences Dan. I just saw a Nature show where parent bald eagles raised two fledglings. Fly Dan, you can do, I know you can. We all, I hope, raise our children to fly.

  12. What a beautiful and simple way of expressing such an enormous loss. My condolences to you and your family.

  13. Dan, my sincerest condolences to you and your family for your loss. Your graph grants simple perspective on what’s important.
    May you find peace and comfort during ’11 and beyond.

  14. Since Christmas day, I’ve been watching my dad fight for his life in an intensive care unit. Today was the first day I went online and this was the first post I read. It struck a very deep chord.

    I am so very sorry for your loss, Dan. You and your family are in my thoughts.

  15. i attended a funeral a couple weeks ago for one of my student’s mom who died after a 2 year bout with cancer.
    this resonated with me: adversity unveils privacy, and the unveiling of privacy is what gets us to authentic community and living a life that matters.

    transparency is one of the many things i admire greatly about you Dan. i believe transparency is our new currency – that it allows for a richness often hard to even comprehend.
    i’m guessing i (we) can thank your dad for teaching how that looks, through you.

    warm regards.

  16. I too am sorry for your loss. I hope you have great support. This is a great example of how the world can connect and help you as well. I hope you find comfort in this long list of love extended to you through your blog.

  17. Sorry I checked in late on this one, amigo. There’s a lot of loss around this time of year. Two people very close to me just witnessed the year anniversary of their losses and it’s crushing to see. Honestly, my thoughts are with you.

  18. This image will never leave me, either. It means your Dad touched another soul even after he passed. He must have been quite a man to raise a kid with your talent and touch. I’m sorry for your loss.

  19. I know it comes a little late, but to know the caliber of which you share your life and ideas with us, it is amazing how little you’re slowed by personal bouts.

    Thank you for all you do and I am sorry for the loss of your father.