You should know your Maximum Heart Rate and your correct training zone to know if you are training at the right pace.

Healthy Heart Zone (Warm up) --- 50 - 60% of maximum heart rate: The easiest zone and probably the best zone for people just starting a fitness program. It can also be used as a warm up for more serious walkers. This zone has been shown to help decrease body fat, blood pressure and cholesterol. It also decreases the risk of degenerative diseases and has a low risk of injury. 85% of calories burned in this zone are fats!

Fitness Zone (Fat Burning) --- 60 - 70% of maximum heart rate: This zone provides the same benefits as the healthy heart zone, but is more intense and burns more total calories. The percent of fat calories is still 85%.

The course allows students to meet requirements by exercising how they want, when they want. They are required to work out hard for 30 minutes four times a week and report to their teachers by e-mail. Parents must certify that the students did the workouts.

Still, some committed online educators remain unconvinced. Tim Snyder, the executive director of Colorado Online Learning, which offers more than 50 online courses to Colorado schools, included physical education with studio art, marching band and the laboratory sciences as subjects best left to brick-and-mortar schools. "These are still better experienced in a hands-on setting," Dr. Snyder said. But online gym has prospered. That has been possible in part because physical education itself has evolved. Once a highly regimented class centered on team sports and competition, physical education now emphasizes healthy living and personal fitness, topics some see as eminently suited for independent Internet study.

Even the course's author, Brenda Corbin, who writes curriculums for the Minneapolis district, was dismissive at first. "I refused to be a part of it," Ms. Corbin said of her initial reaction a year ago, when Ms. Braaten and district administrators approached her about writing the physical education course. "How do you know they're really working out?" Ms. Corbin said she asked. But she later changed her mind. "I was uninformed about what you can do over the computer," she said.

“It’s a cheap education, not because it benefits the students,” said Karen Aronowitz, president of the teachers’ union in Miami, where 7,000 high school students were assigned to study online in computer labs this year because there were not enough teachers to comply with state class-size caps. “This is being proposed for even your youngest students,” Ms. Aronowitz said. “Because it’s good for the kids? No. This is all about cheap.”

But administrators insisted that their chief motive was to enhance student learning, not save money in a year when the 108,000-student district is braced for cuts of $100 million and hundreds of jobs. “What the online environment does is continue to provide rich offerings and delivery systems to our students with these resource challenges,” said Irving Hamer, the deputy superintendent.

Teachers’ unions and others say much of the push for online courses, like vouchers and charter schools, is intended to channel taxpayers’ money into the private sector. “What they want is to substitute technology for teachers,” said Alex Molnar, professor of education policy at Arizona State University. In Idaho, Gov. C. L. Otter and the elected superintendent of public instruction, Tom Luna, both Republicans, promoted giving students laptops and requiring online courses. The State Legislature, pressed by critics who said the online mandate would cost teachers jobs, rejected it, but Mr. Luna said in an interview that he would propose it this summer through the State Board of Education, which supports him. “I have no doubt we’ll get a robust rule through them,” he said. Four online courses is “going to be the starting number.”

As school districts across the country have faced budget gaps, they’ve been forced to cut back. Schools are eliminating programs and cutting teaching jobs and salaries – it’s clear that the U.S. public education system is facing problems. But Wozniak thinks that school systems have not “adapted to children’s needs,” and that computers could help to fill these gaps. Additionally, they could help schools save money. “If you had 30 teachers in a class with 30 students, they’d all get individual attention and be moving at their own paces,” Wozniak said. “So I think someday a computer could possibly be a teacher.”

“School in itself is pretty much a restrictive force on creativity,” he said. “When you come to class, you do the exact same pages in the book, the same hours as everyone else in the class. You don’t go off in your own little directions. This is not the way of the future.”

New technologies are beginning to mimic the capabilities of humans more than ever before. While technology and education experts agree that teachers won’t be replaced by robots anytime soon, computers have helped schools to make strides in student progress and achievement over the past few years. Tools like interactive online education platforms and online courses have demonstrated success, while also helping school districts save money. But to pinpoint successful educational technology, interactivity is key.

3. What is the time requirement for physical education per calendar week? 120 minutes per calendar week exclusive of any time that may be required for dressing and showering.