Every so often, President Trump will don a virtual mortarboard and ensure that the citizens of the United States are up to speed on some of this nation’s great accomplishments and noteworthy leaders.

He did it again on Wednesday, when he made sure that a panel discussion on women’s empowerment being held at the White House was familiar with perhaps-little-known women from history. Abigail Adams. Harriet Tubman. And Susan B. Anthony. Have you heard of Susan B. Anthony?

“I’m shocked that you’ve heard of her,” Trump quipped. It then got a bit awkward, as Trump explained that Anthony dreamed of “an America where women themselves, as she said, ‘helped to make laws and elect the lawmakers.’ And that’s what’s happening more and more.”

“Tough competition out there, I tell you!” Trump added.

To save Trump time in future asides, we’ve made a brief list of people and events he has mentioned as being integral to history so that, should you ever be presented with a pop quiz by the president, you’ll be well-equipped to respond. We’ve listed them in alphabetical order.

Susan B. Anthony

As above: Feminist icon who envisioned a world where women won elected office.

Frederick Douglass

At a Black History Month event in February, Trump offered high praise for Douglass, who, Trump said, “is an example of somebody who’s done an amazing job and is being recognized more and more, I notice.”

Douglass was an abolitionist and newspaper publisher, which Trump may not have known before praising him.

The American flag

In 2008, before he ran for office, Trump learned from Stephen Colbert why there were 13 stripes on the flag: to honor the 13 original American colonies.

The Irish

During a ceremony shortly before St. Patrick’s Day, Trump praised immigrants from the Emerald Isle.

“Irish Americans played a vital role in preserving our union during its hour of greatest need,” Trump said. “So true. Played a very, very big role.”

Specifically: During the Civil War, when Irish soldiers fighting for the Union helped subdue the Confederate rebels who sought to rip America in two.

Abraham Lincoln

The first Republican president, which “most people don’t even know.”

(There’s polling on this one. Most people did know that.)

South Carolina

“South Carolina has a long very, very proud military tradition and history,” Trump said during an event at a Boeing plant in the state last month.

Included in that history: South Carolina’s effort at self-determination following its secession in 1861, an event undone when its Confederate soldiers were defeated in battle by brutal Union soldiers from the North.

Rosie the Riveter

Earlier this month, Trump made sure that those who watched his weekly address were familiar with this obscure assembly-line worker.

Among the workers building B-24 bombers at the Willow Run plant during World War II was one tough lady. You might have heard of her: they called her Rosie the Riveter. And when Rosie’s country called her, she answered the call.

If you hadn’t heard of her before, you have now.

Space program

“Almost half a century ago,” Trump said at a signing ceremony for NASA, “our brave astronauts first planted the American flag on the Moon. It was a big moment in our history.”

Donald J. Trump

Beneficiary of a historic electoral movement in November 2016, according to his official presidential biography: “Millions of Americans rallied behind his message of rebuilding our country and disrupting the status quo — this was a truly national victory and a historic movement.”

That line follows this one: “He also won 306 electoral votes, the most for a Republican since George H.W. Bush in 1988.” In other words, he did better than George W. Bush in 2000 and 2004.

Know your history.