SEATTLE — Leandre Nsabi, a senior at Rainier Beach High School, received some bluntly practical advice from an instructor recently.

‘‘My teacher said there’s a lot of money to be made in computer science,’’ Leandre said. ‘‘It could be really helpful in the future.’’

That teacher, Steven ­Edouard, knows a few things about the subject. When he is not volunteering as a computer science instructor four days a week, Edouard works at Microsoft.

He is one of 110 engineers from high-tech companies who are part of a Microsoft program aimed at getting high school students hooked on computer science, so they go on to pursue careers in the field.

Microsoft is taking an unusual approach to tackling a shortage of computer science graduates — one of the most serious issues facing the technology industry, and a broader challenge for the nation’s economy.

There are likely to be 150,000 computing jobs opening up each year through 2020, according to an analysis of federal forecasts by the Association for Computing Machinery, a professional society for computing researchers.

But despite the hoopla around start-up celebrities like Mark Zuckerberg of Facebook, fewer than 14,000 US students received undergraduate degrees in computer science last year, the association estimates.

“People can’t get jobs, and we have jobs that can’t be filled,’’ said Brad Smith, Microsoft’s general counsel who oversees its philanthropic efforts.

Big technology companies have complained for years about a dearth of talent, a problem they have tried to solve by lobbying for looser immigration rules and sponsoring tech competitions.

Google, for one, holds a programming summer camp for incoming ninth-graders and underwrites an effort called CS4HS, in which high school teachers sharpen their computer science skills at local universities.

But Microsoft is sending its employees to the front lines, encouraging them to commit to teaching a high school computer science class for a full school year. Its engineers, who earn a small stipend for their classroom time, are in at least two hourlong classes a week and sometimes as many as five.

Schools arrange the classes for first thing in the day to avoid interfering with the schedules of the engineers, who often do not arrive at Microsoft until late morning.

The program started as a grass-roots effort by Kevin Wang, a Microsoft engineer with a master’s degree in education from Harvard University.

In 2009, he began volunteering as a computer science teacher at a Seattle public high school. After executives at Microsoft caught wind of what he was doing, they put financial support behind the effort — known as Technology Education and Literacy in Schools — and let Wang run it full time.

The program is in 22 schools in the Seattle area and has expanded to more than a dozen other schools in Washington, Utah, North Dakota, California, and other states. Microsoft wants other big technology companies to back the effort so it can broaden the number of outside engineers involved.