The first lady has been anxious to see her students in person after more than a year of virtual teaching brought on by a pandemic that continues to challenge the Biden administration.
Without fans in the 15,000-seat Tokyo Aquatics Centre on Saturday, masked teams had ample room to spread out in socially distanced seats above the deck.
World leaders who have already promised their attendance in the opening ceremony include French President Emmanuel Macron and US first lady Jill Biden among others.
The last time she attended the games was in 2010, when she and her husband led the U.S. delegation to the Winter Games in Vancouver, Canada.
Over the past 20 years, Indian-Americans have been dominating the Spelling Bee contest even though they comprise only about 1 per cent of the US population.
Jill Biden is spending most of the Fourth of July weekend appearing in Maine, New Hampshire and Pennsylvania at events celebrating progress on fighting the coronavirus.
The Bidens are in Cornwall, southwest England, where the U.S. president is attending a Group of Seven wealthy democracies summit.
The women also plan to take part in a talk about early childhood education. The White House says it’s the first time they’ve met.
The president has renewed his call for Congress to codify the program, called Deferred Action for Childhood Arrivals or DACA.