Perhaps, from some of the comments it is not generally understood what unschooling is. Basically it allows the child to pursue their own interests at their own pace, with parental assistance, thereby never stunting the humans' natural desire to learn by having information forced on them, tests etc. and removes the child from social conditioning endemic to public school.
Unschooling creates kids that can think for themselves and have the skills to aquire and process any new information they need/desire throughout life.
I enjoy unschooling our kids as I get to learn about new stuff all the time too as their interests shift and I assimilate new info as they do.
Here is the wiki reference on the subject. While I rarely trust wiki for info I think the Unschooling entry is safe.
http://en.wikipedia.org/wiki/Unschooling
The term "unschooling" refers to a range of educational philosophies and practices that differ markedly from conventional schooling; while often considered to be a subset of homeschooling, unschoolers may be philosophically as estranged from most homeschoolers as they are from the advocates of conventional schooling. The term unschooling was almost certainly coined by John Holt in the 1970s,[1] who is also widely regarded as the "father" of unschooling.[1] While there is significant variation in what is meant by "unschooling", generally speaking, unschoolers believe that the use of standard curricula and conventional grading methods, as well as other features of traditional schooling, are counterproductive to the goal of maximizing the education of each child. Instead, unschoolers typically allow children to learn through their natural life experiences, including game play, household responsibilities, and social interaction. Exploring activities is often led by the children themselves, facilitated by the adults. Child directed play is a key tenet of the unschooling philosophy.