I looked into OneKey, but am not sure if it's a unique collaboration with Google to deliver child-friendly content, or if it's just a method of forcing safe-search within Google's results?
I've been aware of using advanced and honed search for a while, so there was nothing really new there for me. I wish there were more scholarly articles available for free.
I hope that others can learn from the hierarchical and organized structure of URLs. Also needs mentioning that the 'www' is only needed for about 0.0001% of the web addresses out there.