I'm Dan and this is my blog. I'm a former high school teacher, former graduate student, and current head of teaching at Desmos. More here.


  1. David

    January 1, 2011 - 6:11 am

    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. Andy

    January 1, 2011 - 6:58 am

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

  3. Chris Craft (@crafty184)

    January 1, 2011 - 7:36 am

    My deepest condolences for you and your family, and my prayers for grace in this tough time.

  4. Jen

    January 1, 2011 - 7:57 am

    So sorry to hear this. This is likely the only graph that’s ever made me tear up.

  5. Sean

    January 1, 2011 - 8:24 am

    Math as poetry. Sorry for your loss and grateful that he raised you.

  6. Erik

    January 1, 2011 - 10:43 am

    I am sorry for your loss.

  7. Alec Couros

    January 1, 2011 - 11:06 am

    I’m so sorry to hear of your loss, Dan. My condolences.

  8. Nico

    January 1, 2011 - 11:07 am

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

    My condolences.

  9. Ben K.

    January 1, 2011 - 11:17 am

    So sorry. I lost my mom in 2005. Still can’t believe she is gone. I pray that you find peace amongst the heartache.

  10. Veronica

    January 1, 2011 - 11:30 am

    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.

  11. luke

    January 1, 2011 - 12:01 pm

    So sorry to hear that, Dan. Thanks for letting us know.

  12. Kate Nowak

    January 1, 2011 - 12:22 pm

    I’m so sorry. Peace to you and your family.

  13. Jason Kern

    January 1, 2011 - 12:26 pm

    Amazing how one jpg can say so much.

    So sorry for your loss.

  14. K G

    January 1, 2011 - 2:25 pm

    I’m so sorry for your loss. My dad died on January 9, 2010. I really miss him.

  15. Simon Job

    January 1, 2011 - 3:23 pm

    My condolences Dan. A simple yet powerful memorial.

  16. Chris S.

    January 1, 2011 - 3:30 pm

    One is the loneliest number, and now 100% is the saddest. I am sorry for your loss.

  17. John B.

    January 1, 2011 - 4:21 pm

    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.

  18. Sam Shah

    January 1, 2011 - 5:32 pm

    I’m so sorry for your loss. My thoughts are with you.

  19. Anne Schwartz

    January 1, 2011 - 6:22 pm

    I can’t even begin to understand. I’m so sorry.

  20. Mary Watson

    January 1, 2011 - 6:44 pm

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

  21. Dean Shareski

    January 1, 2011 - 7:27 pm

    I have to admit I was looking forward to seeing your great work again but I can appreciate and relate to your loss. Stay well.

  22. Amanda

    January 1, 2011 - 8:02 pm

    So sorry to hear about your dad, Dan. I hope that 2011 brings healing and happiness to you.

  23. Iain

    January 1, 2011 - 8:40 pm


  24. Steve G.

    January 1, 2011 - 10:02 pm

    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.

  25. Chris Smith

    January 2, 2011 - 10:53 am


    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!


  26. Dave Gale

    January 2, 2011 - 11:16 am

    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.


  27. Kristen Fouss

    January 2, 2011 - 12:35 pm

    So sorry for your loss.


  28. Michael Paul Goldenberg

    January 2, 2011 - 2:50 pm

    My condolences, Dan. My thoughts are with you and your family.

  29. Bill Fitzgerald

    January 2, 2011 - 3:34 pm

    Well, crap.

    I’m so sorry for your loss.

    Wishing you and your family the best.

  30. Laura

    January 2, 2011 - 4:15 pm

    So sorry to hear about this.

    I’ll be praying for you.

  31. Elizabeth S

    January 2, 2011 - 4:26 pm

    So sorry for your loss, Dan. My thoughts are with you and your family.

  32. 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.

  33. D Driskill

    January 2, 2011 - 5:59 pm

    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.

  34. Max Stone

    January 3, 2011 - 2:45 am

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

  35. Jon

    January 3, 2011 - 5:31 am

    I’m sorry for your loss. The graph says it all.

  36. Surani Joshua

    January 3, 2011 - 9:03 am

    I am so sorry for your loss. You are in my thoughts.

  37. TWebster

    January 3, 2011 - 10:48 am

    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.

  38. colleenk

    January 3, 2011 - 4:36 pm

    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.

  39. Natasha

    January 4, 2011 - 9:03 am

    I’m sorry for your loss.

  40. Ed Hitchcock

    January 4, 2011 - 12:43 pm

    I think that is the saddest graph I have ever seen. My deepest sympathies.

  41. Scott

    January 4, 2011 - 5:48 pm

    I feel your pain. I lost my dad in May.

    Sorry for your loss.

  42. Jen

    January 4, 2011 - 6:34 pm

    I’m so sorry for your loss…may your memories of him carry you through your grief.

  43. Shelley

    January 5, 2011 - 10:41 am

    Oh, Dan, I’m so sorry to learn of what must be a devastating loss. Am holding you and your family in the Light…

  44. monika hardy

    January 6, 2011 - 7:18 am

    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.

  45. Telannia

    January 6, 2011 - 8:41 pm

    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.

  46. Todd

    January 6, 2011 - 11:03 pm

    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.

  47. Craig

    January 8, 2011 - 4:43 am

    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.

  48. Chris Lehmann

    January 8, 2011 - 9:43 pm

    So sorry, Dan. I know how much my father means to me; my thoughts are with you.

  49. Melanie PFlaum

    January 8, 2011 - 10:33 pm

    Sorry for your loss.

  50. Guy Hed

    January 9, 2011 - 2:26 am

    Sorry for your loss.
    Thanks for sharing with us.

  51. JimP

    January 9, 2011 - 6:20 pm

    So sorry fr your loss.

  52. Dan

    January 21, 2011 - 9:47 pm

    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.