All classes in the Garment Skills Series -- after GS01 -- can be taken "ala carte" - after completing Garment Skills I you may take any or all of the other Garment Skills classes in any order.
Garment Skills III is all about optional clothing features. You will learn three different pocket constructions and five different hem treatments. A sewing machine will be required for this class. No patterns will be required. Basic sewing tools will be necessary.