Army and Navy both accept GED, it is possible that others do too.
As far as I know there are no specific customer service classes. When you get a restaurant management classes you learn everything you need to know about customer service too.
A 747-400 with 3 classes of service holds about 416 passengers. With 2 classes of service it can hold 524 passengers.
There are engineering, physics and even calculus offered through this service. Most online classes that are offered at a traditional university can be taken via this service.
Well each school will offer different classes and the larger the school the more likely she can find more focused classes for customer service, but there are a few she should take that you can find anywhere. I would suggest business, speech, and math as these are important to any customer service job.
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service industries. they don't give you anything but they provide a service instead
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You need to be certified. You can take classes at a community college.
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"It depends on what and where you are trying to market. If you are running your own company, then classes might help but aren't required. If you are trying to get hired into marketing, then you should take classes or volunteer."