Development, as often happens, proceeds here not in a circle but in a spiral, passing through the same point at each new revolution while advancing to a higher level. ~ Lev Vygotsky, Mind in Society

This is nexus 504. It started out as a curriculum dump for my 11th and 12 grade students when I taught high school, and I am now converting it to a series on online syllabi for my students at UMass Lowell. Look to the left for your course.