A question for anyone who knows Sign Language(ASL)or knows about it?

I’m trying to learn sign language, but it seems like there is more than one way to sign.

Like for example: Know there seems to be more than one sign for that.

I’m trying to learn from http://www.aslpro.com and alot of there signs are different than what I have already learned .

Please help any advise or anything you know would be helpful.
Thanks(:
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Liu Approved by U.S. Senate Panel for Appeals Court (Update1)

Liu Approved by U.S. Senate Panel for Appeals Court (Update1)
May 13 (Bloomberg) — The Senate Judiciary Committee approved on a party-line vote the nomination of law professor Goodwin Liu to be a federal appeals court judge, clearing the way for possible confirmation by the full Senate.

Read more on Bloomberg

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What is the most common form of sign language in the world?

I was wondering what are the most common forms of sign language in the world. I was hoping to get maybe the top five. Thanks.
The most common forms of the spoken language are Chinese, English, and Spanish. Does this mean that those are also the most common in sign language as well. Then there is International sign language, although I am not sure how common it is.
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How useful is sign language?

I want to learn 4 languages not including sign language. My sister and I were going to take a German class (which is one of the languages i plan on learning) but they were like 5 days a week for something like 4 hours and then another 16 hours of lab. So we were going to take sign language instead which I actually kind of want to learn. I just want to know if it is going to be a big waste of time. How often does someone living a normal life use sign language? Is it at least kind of important if you plan on traveling a lot?
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Baby Reading at 17 Months


Xervier has Down Syndrome. He has been learning sign language from birth and reading from 4 months of age. He used his first sign (“milk”) at 13 months of age and read his first word (“drinking”) at 14 months of age. For more information on Reading and Down Syndrome go to: sites.google.com For more information on sign language and Down Syndrome go to: sites.google.com.