WASHINGTON - Tom Seligson remembered a more innocent time after he watched President Bush rally people with a bullhorn from atop the mound of rubble where the World Trade Center used to be.

``When I saw him after 9/11 with the bullhorn, it fit,'' said Seligson, who attended prep school with Bush. ``His response to terrorism was grabbing a bullhorn at ground zero, basically challenging us to rise above it. This was no different from the George -- the cheerleader with a megaphone at Andover -- of 40 years ago.''

But the Bush known then by his classmates at the exclusive prep school and at Yale University and the Bush known now around the world are two distinct figures -- one seemingly carefree and privileged, the other burdened by the pressures of the Oval Office.

Yet those early years -- from Bush's entry into Andover in 1961 to his graduation from Yale in 1968 -- did much to shape his character and form beliefs that many said he took to the White House.

``Andover and Yale, in many ways, have a greater import in shaping the core personality of Bush than any other period,'' said Bill Minutaglio, the author of ``First Son: George W. Bush and the Bush Family Dynasty. ``It not only shaped his worldview as an adult and his public policy as a politician. If Bush's policy is about going it alone, defining the world in black and white, you could say it started back then.''

Nicknamed `Lip'

George W. Bush was called many things during his high school and collegiate days, but ``future president of the United States'' wasn't one of them.

He was nicknamed ``Lip'' by Andover classmates for his wisecracking ways at the then-all-boys Massachusetts boarding school. He dubbed himself ``Tweeds Bush'' -- after the infamous Boss Tweed of New York Tammany Hall fame -- while others called him the ``High Commissioner of Stickball'' for organizing teams to play rollicking games on the usually staid campus.

His teachers called him an earnest but unspectacular student; he earned a zero on the first paper he wrote at Andover, for using a word that appalled the professor.

Despite his family's political pedigree, few people saw any sign in young George of an ambition to end up in the White House. What they saw was a fun-loving fraternity prankster more interested in partying than politics, and a person eager to shed the shadow of his father.

Some Bush friends think that's overly simplistic. They say his affability overshadowed his intelligence and obscured the budding political skills that he employs today: an ability to get people to like and support him, a knack for organization and a fierce determination to stand firm in his beliefs.

``He's very street-smart, and people always underestimate him,'' said Lanny Davis, a Yale fraternity brother of Bush's who went on to help President Clinton through several White House scandals. ``He was one of the friendliest, most down-to-earth, unpretentious people at Yale,'' said Davis, who likes Bush personally but loathes his policies.

Bush's path from adolescence to adulthood began in the same place as his father's: Phillips Academy in Andover, Mass. The elder George Bush was a campus legend: senior class president, captain of the baseball team and a student who bucked the advice of Secretary of War Henry Stimson, Andover's 1942 commencement speaker, and put off college to enlist in the Navy and enter World War II.

Bush the father was a man of New England, the son of Sen. Prescott Bush of Connecticut. Though George W. Bush also was born in Connecticut, he was very much a child of Texas, having been raised in Midland and Houston.

When the 15-year-old Bush arrived at Phillips in 1961, he found the transition from Texas to New England daunting in terms of climate and attitude.

`A long way from home'

``Andover was cold and distant and difficult,'' Bush wrote in his political biography, ``A Charge to Keep.'' ``In every way, I was a long way from home.''

Bush said he had to adjust from the ``happy chaos'' of the Bush household in Texas to Andover's discipline.

``We wore coats and ties to class,'' he wrote. ``We went to chapel every day, except Wednesday and Saturday. There were no girls. Life was regimented. . . . I missed my parents and brothers and sister. It was a shock to my system.''

Bush also was struggling in class. For his first essay -- on emotions -- he wanted to impress his ``Eastern professors'' by using ``big, impressive words.'' Looking for a way to describe ``tears'' running down his face, he consulted the Roget's Thesaurus that his mother had given him. He replaced ``tears'' with the word ``lacerates.''

The teacher marked the paper with a zero so bold that ``it left an impression all the way through the back of the blue book,'' Bush wrote.

Tom Lyons, who taught history and was one of Bush's favorite teachers at Andover, said Bush tried hard in class but struggled to keep up at the academically formidable school.

``He did not stand out,'' said Lyons, who retired in 1999 after 35 years at Andover. ``He was just a solid kid who worked hard and did average work.''

Yale wasn't the comfortable cocoon for Bush that Andover had been, several of his friends and classmates said. The Vietnam War and America's domestic strife were spilling onto college campuses. Bush, by his own admission, was not an active participant in the social changes swirling around him.

``I was not part of the flower-child revolution,'' he told Knight Ridder in 1999. ``I was concerned, but I wasn't marching in the streets. I didn't go to Woodstock.''

Minutaglio said Bush ``chose to isolate himself from the very complex issues of the day. It seems he deliberately, almost defiantly, withdrew into a world he was most comfortable with, almost a 1950s world.''

Bush embraced the traditional college life -- with gusto. He joined the Delta Kappa Epsilon fraternity and, like his father, was initiated into Skull and Bones, a secretive, high-status campus social club.

Bush was arrested in 1966 on disorderly-conduct charges arising from the theft of a Christmas wreath from a storefront to decorate the fraternity house. The charges later were dropped.

DKE had a reputation for hearty partying, and Bush was its president in 1966-67.

``There was a `draft Bush' movement because it was a job of being socially comfortable and attracting the best women on campus,'' Davis said. ``He succeeded. DKE had the best parties.''

Politician's knack

Bush became known for an ability to move effortlessly among the different groups on campus. He began displaying a politician's knack for remembering names, faces and events that would enable him to talk to people he had met months before as if it were only yesterday.

``I thought I was outgoing, knowing 65-70 people,'' said Livingston Miller, a Yale friend of Bush's. ``Bush knew 700. He knew their names, their relationships and their pasts. He was good at connecting people to events. It's prodigious.''

Though he praises Bush's partying skills at Yale, Davis said it was a mistake to think of Bush back then as strictly a good-time Charlie. He said Bush was gifted with ``analytical people skills'' that allowed him to sum up someone quickly.

Bush also was sensitive. Davis recalled sitting with Bush and some other schoolmates in their dorm talking about people when one of them began razzing a male student, who he thought was gay, as he walked by.

``Someone made a snickering comment and used the word `queer,' '' Davis said. ``Bush turned and told the guy who made the remark, `Look at walking in the other guy's shoes.' I'll never forget that.''