I suggest that you study the scientific books that 13 year olds study from.  One video that has been used [2 hour in duration] in educating young adolescents is called "How the World Began".  There is much proof out that humanity, just like other species of animal, began at a lower level and progressed to a higher level.  It took us many centuries to even understand this.  This is seen in very fact that it was only in the early 20th Century, that the so-called Neanderthal man's remains were discovered.  The Neanderthal was a sub-species of humanity living in the Stone Age.


If this is the process that God chose to use to develop the universe, and in particular our earth, and especially humanity----what's wrong with that?  The Bible was never intended to be a history book, or a scientific text.  Genesis tells us that God did create all.  YES.  But we did not really understand HOW this really happened until just not that long ago.