Obama, who brought up in a working class family in Chicago, said she watched girls strive as she had and she would continue her campaign for girls' education that became a passion while in the White House alongside her work on childhood obesity. She joked that Barack was "a little jealous" of her book's success. "I tell woman that whole 'you can have it all.' nope, not at the same time-that's a lie", she said. "And, I had to learn how to express that to my husband, to tap into those parts of me that missed him - and the sadness that came from that - so that he could understand". Love is the dinner table, love is consistency - it is presence.
"I still feel that at some level I have something to prove because of the colour of my skin, because of the shape of my body ... who knows how people are judging me".
More than 40,000 people had reportedly tried to get tickets online when the event went on sale.
The couple tied the knot in 1992 and have two daughters - Malia, 20, and Sasha, 17.
She encouraged pupils to support each other, saying: 'We as women don't have the luxury of tearing each other down, there are enough barriers out there'.
'We laughed about how many hours were spent inside our heads, hoping a boy would ask us to dance, or stewing over a big test, just doing everything we could to avoid even the most minor embarrassments'.
Offering a message specifically to young black women, she said: "It's still hard out there". These days, I'm more in control of my time'.
Michelle Obama tells London school she still has imposter syndrome
"They're charging forwards in sports and maths and science and technology", she told Good Housekeeping. They're speaking up and speaking out.
She also recalled how the Queen had dismissed royal protocol as "rubbish" when the Obamas visited Windsor Castle.
"Here's the secret. I've been at probably every powerful table that you can think of". And that makes you feel that you don't belong.
"I'm back now", Obama said, smiling and looking a bit sheepish.
Recalling a visit to Windsor Castle, where she couldn't remember which side of the vehicle she was supposed to get into, Michelle said of The Queen: "She says, "Just get in, sit wherever", and you are trying to remember protocol and she says 'It's all rubbish, just get in'". If you look at the history of America, the Voting Rights Act is not as old as I am so we are still overcoming. What do you want?
'And as I said then, you remind me of me and all the fears and all the challenges that you face.
'I'd walk away from those events so hopeful. "I have never been a fan of politics and my experience over the past 10 years has done nothing to change that". "They haven't fixed it yet because they need our voices to make that happen".More news: English couple thanks NYC police for finding lost ring