I think it's awesome what Danica did with her life. I personally don't like math, but it's great that she is trying to get people to like it. She is both brains and beauty!

Danica Mckellar/Winnie is quite possibly the sexiest woman in America. Not only is she intelligent, she's talented, well-spoken, and beautiful.

I think it's great that she is trying to make people smarter.

Did anyone else release this is Murr's crush?

I love her voice so freaking much originally heard her in young justice as a kid such an awesome gal!

Here's the dilemma, if she teaches people how to be smart, then who will continue to watch this show.

WHAT ABOUT THE DAMN PINEAPPLE?!?!?!

I've never watched Wonder Years, so to me she is and always will be Miss Martian from YJ

She's 40 guys. Fucking 40...

Jimmy reaction was hilarious... "WHAT? You thought I was going to get that?!"

she hasn't aged a bit at all!

Danica is the BOMB. And Costner is the defuser. Thanks anyway, Jimmy.

HE SHOULD HAVE ASKED HER WHERE THE PINEAPPLE CAME FROM!!!!!!!!!!!!!!!!!!

I love you forever Danica McKellar! 🌷

holy macaroni - she is 41?!

I love you Danica!!!

I cant believe how good she looks at almost 40 years old.

This is spot on, at least the part about math makes you a better problem solver

I love When Danica McKellar teaching skills with Jimmy Fallon. She’s my favorite she’s so cute and gorgeous she is I always think that she’s the best. Is she making more Hallmark movies I love it

"how to survive middle school math" hahahahahahhah

she makes me melt

I love Danica how can you not

Wow im sitting here like No! "doctor awkward" is not a palindrome... But then I realized "dr awkward" is though!

I haven't came across many people who love maths; I do. Algebra is my absolute favourite.

DOCTORAWKWARD? That's not a palindrome.

My 80s crush.

Oh!!! The girl of pineapple incident... Yeah !!!

HAHAHAHAHA!😘😍❤💞💗 i love Danica what a SWEETHEART! And Kevin Costner just laughing!😉❤ GREAT SHOW

Funny how she mentioned martians in this because she voiced a martian called Megan Morse in a show called Young Justice. :)

OMG! I was Kevins age at the setting and I can remember every iconic moment. Bryan was my cus,Winn was Tami,Kara was Jamie,Kev was my sis.

Danica and Lacey are my children in another life lol

Costners thinkin "I gotta tap that"

happy 42th birthday danica mae mckellar !!!

I think Danica is very smart. She is a smarter, hotter version of Jessica Alba. I missed Danica's Christmas movie on Hallmark, but I saw her 2014 film.

wow, awesome. 700.000 subs for a couple of months ago and now 3.000.000. congrats jimmy!

"Otto. That's one palindrome you won't be hearing for awhile."

HOT , SMART AND RICH.... IF ONLY SHE LIKED LAZY STONERS THAT PLAY XBOX ALL DAY...

That's right Mr. Costner you scooch that other way. Your wife is leaning into the television, making sure you don't make any wrong moves.

math does suck, it really, really does.

ted's one night stand?

I love danica mckeller

I saw her today at a convention and I cannot believe how different she looks in real life!

Smart and super cute! Im IN LOVE 😍!!!!

Changing the speed of the video to .5 is funny.

She's so pretty😻

Still in love 😍

She was on The Wonder Years and How I Met Your Mother

But Tracy... does the book tell us what happened with the pineapple?

Good Lord Danica McKellar...

wow she is amazing!!!!

An Intelligent woman I'm in love and she also gorgeous... I believe...

Danicka Cooper and Kevin! ... Costner!!

I like her character I watched her movie Wrong woman loved it ❤

oh, winnie.

Math wouldn't suck if Danica were sitting on my lap..You can count on that..lol

Wow she's amazing

Gwendolyn "Winnie" Cooper Forever !

Wasn’t she on that 1 episode of TBBT...I only know her from there lol

Jeez I'm so in love!

Red rum, sir, is murder.

Beautiful and smart, perfect

I was thinking poop when she was talking about alien burgers

M'gann talked about a Martian palindrome. :D

Trudy, the girl from HIMYM.

Look up "Erdoz-Bacon number" on wiki. She has one.

Does "LOL" count as a palindrome? 😂 jk LOL!!! 😅

She is a national treasure. This woman is unbelievably extraordinary, talented, charismatic, smart, and beautiful.

*NEWS FLASH* Math does suck!!!

Meth doesn't suck :P

Winnie Cooper.. She's still hot! hahaha

What would you do if I ........... O sorry Flashback lol

So is there a day when she does emordnilaps? Emordnilap (palindrome spelled bakwards) is a word that is something forward and something else is reverse: desserts = stressed, deliver = reviled, etc.

Amei a entrevista da estrela Danica McKellar. Interessante é que Danica e Kevin Costner são do mesmo signo astrológico: Capricórnio.

20 million people watch dancing with the stars? Jeez

OOOOOOOH OKAY.... Dr. Awkward... Gotcha!

Jesus Christ this woman is incredible. Making feminists cry themselves to sleep alone more so I bet

Millions of people around the glob are crying because of Math and she is telling us that Math doesn't suck ?!

years ago, I went to the George Lopez Show(taping) and when I was trying to get out of the parking lot(Warner Bros Studios), a car almost hit me. Luckily the driver stopped and let me pass. When I started walking away I realized that Winnie Cooper was driving the car! lmao!! She was there to tape an episode of the Big Bang Theory! lol #akwardmoment

but... the pineapple?

vote for Danica and her partner Val on abc.com!!!

I agree i love u so much

The all in one girl!!!

But can she beat Demetri Martin's: Dammit I’m mad. Evil is a deed as I live. God, am I reviled? I rise, my bed on a sun, I melt. To be not one man emanating is sad. I piss. Alas, it is so late. Who stops to help? Man, it is hot. I’m in it. I tell. I am not a devil. I level “Mad Dog”. Ah, say burning is, as a deified gulp, In my halo of a mired rum tin. I erase many men. Oh, to be man, a sin. Is evil in a clam? In a trap? No. It is open. On it I was stuck. Rats peed on hope. Elsewhere dips a web. Be still if I fill its ebb. Ew, a spider… eh? We sleep. Oh no! Deep, stark cuts saw it in one position. Part animal, can I live? Sin is a name. Both, one… my names are in it. Murder? I’m a fool. A hymn I plug, deified as a sign in ruby ash, A Goddam level I lived at. On mail let it in. I’m it. Oh, sit in ample hot spots. Oh wet! A loss it is alas (sip). I’d assign it a name. Name not one bottle minus an ode by me: “Sir, I deliver. I’m a dog” Evil is a deed as I live. Dammit I’m mad.

I am so enamored by her brains and beauty.

I forgot she did Dancing With The Stars.

DOCTOR AWKWARD IS NO PALINDROME

I knew her from the Avril Lavigne music video Rock n' Roll

DAMNIT TRUDY WHAT ABOUT THE PINEAPPLE!!!!!??

Genia hermosaaaaa

Jimmy is so great. His laugh is so contagious.

I love Math As well

Math doesnt suck but school does

Jimmy - the narrator me? play a game about palindromes? what was I thinking?

Genetic jackpot!

The way she sticks out just the tip of her tongue at 0:40. So cute. = ]

She was in Avril Lavinge's music video for RockN'Roll. Ya'll should watch and listen to it if ya haven't. Its amazing!

A smart funny cutie❤

a car, a man, a maraca

Momma scored 3 10s on Dancing with the Stars tonight, intelligent and talented.

Es muy buena persona. Guapa, inteligente, simpática, agradable... , lo tiene todo para ser la chica perfecta. En los 90 su flequillo provocó que todas las niñas del mundo copiasen su peinado. Por algo le llamban la Supercooper.