I dont know of any free online writing classes as such, but
there's plenty of websites that will share help and tips about how
to write online.
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You can get tips on self improvement by reading self improvement
magazines like "Self" and looking online for self improving
websites that can give you helpful tips. You can also seek out
self-help classes and/or programs in you community.
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If you go to an IRS building, they will actually give you free
tax tips. You can take tax prep classes, but there is a lot of free
content available online as well.
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While there are no free online photography classes you will be
able to find some great information on how to use your camera and
get some great tips. You could also check and see if there are any
classes offered in your community for photography. They are usually
very inexpensive and you will be able to learn a lot in a short
amount of time.
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Yes there are online classes that will help to fill out job
descriptions. The online classes can be found on the pages of
agency.government. They have great online classes.