
Argues that the purpose of Stonehenge was to predict the occurrence of eclipses, and reviews the resulting cultural implications.
Did your teacher publish anything? I'm aware of Alexander and Archie Thom [1], John North [2] and Fred Hoyle [3] as well as the pop science books by Gerald Hawkins.
[1] http://en.wikipedia.org/wiki/Alexander_Thom
[2] http://articles.adsabs.harvard.edu//full/1999JHAS...30...83R...
[3] http://www.amazon.com/On-Stonehenge-Fred-Hoyle/dp/0716703637
PS: remember that climate in Britain was very different from now and changed a lot during the construction of megalithic sites. Inland Britain was as you say covered with dense forest so river valleys and coastal areas were very important then.
