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5 Feb 2010, David McIntyre:

Student issues:

1)	Missing subscripts.  Missing $S^2$  operator equation.

2)	Not sure about eigenvalues; saying spin ½ does not trigger reaction desired.

3)	Most OK.  Different orderings, but preferred order did come out.

4,5)	I did not say (by design) that we were working in the 2-spin system, so many students did not work in the 4x4 system at first, but I helped smooth that out.  Some students found matrices by inspection, others explicitly by action on states.  Some confusion on labeling.

4 Feb 2011:

Overall went very well this year.  Took 20-25 minutes.  #1 had some issues with notation, but after a review of notation, the rest went very smoothly.  Most did 4&5 by inspection, without writing down any ket eqns.  For those who finished first, I asked them to add $S_z$ and $I_z$ together and see what the said about the spin of the system -- a prelude to the coupled basis.