When Scott Landry flunked a math class in his Townsend, Mass., high school this year, he was told he wouldn’t make it into the 10th grade unless he went to summer school.

So how was the 14-year-old starting his third week of a summer algebra class?

“I’m going skateboarding and hanging out with my friends,” he said. Of course, he wouldn’t get around to those tasks until he rolled out of bed around 11 a.m. Algebra would wait until about 8 p.m., when he was done playing and ready to log on to his computer.

With a growing number of schools letting students like Scott take classes and make up credits online, summer school’s punitive reputation is slipping. Many teens are finding less of a need to spend their summers cooped up in a classroom missing out on camp, vacations and jobs.

“You have all day to do one assignment,” Scott said. “And if you’re really busy one day, you can work on stuff the next day.”

Submitting their assignments in e-mails, “talking” to teachers through instant messaging and interacting with other students in online discussion groups lets them learn at their own pace. They do the work when they find time for it, and some students and their parents say the system is making learning easier.

“These online classes have been a blessing,” said Carol Meerschaert. Her 16-year-old daughter, Claire, has an attention deficit disorder that kept her from passing English in her sophomore year at high school in Falmouth, Maine.

“She’s smart, but her grades weren’t showing it,” Meerschaert said. “Now, if she needs to re-read something or come back to it when she’s ready, she can. And she’s getting better grades.”

And with only about 90 minutes of online class time needed each day, she’s spending her summer vacation the way she wants.

“I get up, do the work, then have time with my friends,” she said.

Claire and Scott Landry are both taking their courses this summer through the Maynard, Mass.-based Virtual High School, one of about 25 organizations offering online courses.

“Kids are already so used to using the Internet that this is an easy way for them to learn,” said Susan Patrick, president of the North American Council for Online Learning, based in Tysons Corner, Va. “They’re taking these courses because they need more flexibility, and students should have options.”

According to the U.S. Department of Education, one-third – or about 6,000 – of the country’s public school districts give credit for online classes.

Some teens are taking the courses because they want to get extra credit or take courses their traditional schools don’t offer. But a growing number are turning to online learning for summer school classes.

Statistics aren’t kept for how many of the estimated 700,000 students taking online courses do so for summer credits, but Patrick guesses the number is around 100,000.

“Online classes were primarily targeted to students taking electives in addition to regular academic programs,” said Timothy Magner, the DOE’s director of educational technology. “But there’s an increase in the number of students who are taking them for core courses or credit recovery. That’s becoming more mainstream.”

About 25 states have developed their own Internet-based curriculums, while others use the courses created by companies such as Virtual High School, Magner said.

Whether courses are paid for by a school or a student’s family varies from district to district.

Liz Pape, chief executive of Virtual High School, said her decade-old organization began offering summer courses in 2003 when she noticed more schools cutting back on their summer school programs.

“We stepped in and said OK, we can work with these schools to help them out,” she said. “There was definitely a need for it.”

The University of Miami Online High School saw the same need, and started offering summer school classes two years ago.

“Kids want the flexibility and they want the opportunity and ability to do other things in the summer and not just sit in a classroom,” said Howard Liebman, the school’s president of academic operations. “And we also started seeing a lot of parents and students who are freaking out because the kids need to make up courses that aren’t being offered in traditional summer schools.”

That’s exactly the position Christopher Steeves Jr. found himself a few months ago at the end of his sophomore year at Indian River High School in Chesapeake, Va.

With his sights set on going to the Air Force Academy, the 15-year-old realized he missed out on taking enough math courses during his first two years of high school. Making up the credit would mean a huge course load this coming year or summer school.

He wanted to take an honors-level algebra class to catch up on the credits he needs, but his school wasn’t offering that class this summer. So he signed up for an online class through the University of Miami Online High School.

The time he spent every day taking the online class didn’t stop him from visiting his mother in Colorado for three weeks of hiking and whitewater rafting.

“I did the course work while I was out there,” he said. “I’d start off doing about 30 minutes a day. But when the classes got harder, it would take a little longer. But it was better than spending a whole day in a classroom during the summer.”