investigation articles- bilingle households

http://www.babycenter.com/0_raising-a-bilingual-child-the-top-five-myths_10340869.bc

This article disproves statements, for example, 'Growing up with more than one language confuses children.' It goes on to explain why it disagrees with the statements and backs it up with evidence and explanation. 
It disproves: 

Growing up with more than one language confuses children.

Raising a child to be bilingual leads to speech delays.

Bilingual children end up mixing the two languages.

 It's too late to raise your child bilingual.

Children are like sponges, and they'll become bilingual without effort and in no time.

http://www.omniglot.com/language/articles/bilingualkids1.htm

This article appears to be giving advice to parents wanting to teach their children two or more languages. Giving tips such as: Family agreement, Enthusiastic...yet realistic, The practical plan, Get together, Be patient. 

http://en.people.cn/102774/8399031.html

This article states the top 10 hardest languages to learn. 

http://eclkc.ohs.acf.hhs.gov/hslc/tta-system/cultural-linguistic/fcp/docs/benefits-of-being-bilingual.pdf

This gives the advantages of being bilingual 

 http://www.literacytrust.org.uk/assets/0000/0804/FAQsonbilingualism.pdf

This article contains frequently asked questions about bilingualism