Δ1-Δ2

d class.odt hello

d class week 2

d class weeks 3-4

d class week 5

d class week 6

d class week 7 (odt)  d class week 7 (pdf)

d class week 8(odt)   d class week 8(pdf)

d class week 9(odt)   d class week 9(pdf)