Strangeness Production Experiments at Jefferson Lab

Experimental results for photo- and electro-production of open strangeness from the Thomas Jefferson National Accelerator Facility are discussed. The results are from work completed by mid-2003 on elementary $KY$ production, nuclear targets, and the exotic ${\mathrm{\Theta }}^{+}$ state. It is shown how the increases in intensity and precision of JLab experiments over earlier work have allowed new phenomena to become measurable.