The word "bettering" is correct and it can be used in written English.
Generally, it means to make something better or to improve something. For example, "At first, Johnny had great difficulty completing Math problems, but with frequent tutoring, he has been steadily bettering his skills."
We get them to focus on bettering themselves and looking at their personal relationships.
She had a protestant work ethic and felt that everybody should have the opportunity to make their own way by their own efforts, and that no one should stand in the way of people bettering themselves.
Only a late goal from Mitch Clark prevented the Dockers from bettering their biggest-ever winning margin over Geelong, which remains at 45 points set back in 2002.
A prime minister desiring a second election in the hope of bettering his position could try to engineer a vote of no confidence in his own government.
Bettering Boeing Identity rules Uncut Auf wiedersehen, Ron Reprints Related items Health care and ex-servicemen: Senior serviceJul 18th 2002This is not the first time that Pfizer has proved to be the Victor Kayam of the industry, liking a product enough to buy the company.
Once the cold-war logjam was broken, more people remembered the lofty language of the UN charter which speaks of the "economic and social advancement of all peoples"—in other words, bettering the lot of the human race in just about every way.
A fair reckoning of the costs America bears in providing security worldwide would place its contribution to bettering the lot of the world's poor far higher than the stingy-seeming 0.15% of GDP spent on aid that you cite.
Latinos, who make up 41% of the state's public-school population, have enormous faith in education as a way of bettering their lot, but usually feel short-changed by the system.
The prospects for bettering the 2008 target of 4% of GDP also look good.
This, he says, will eliminate the temptation for people to move back (and some have already tried).The government has attempted to sell the project as a way of bettering citizens' lives.
Lowe's, number two in the sector, announced a 42% increase in profits in the quarter to $467m.Axa sharpeningAxa, recently forced to defend its share price publicly, published results bettering expectations for the first half despite high insurance claims and weak financial markets.
