The 0.4 FTE is for a course called Exploring Technology, which is currently a course aligned to the Machining and Forming Technologies pathway in the Manufacturing sector. The candidate should have a Designated Subject (CTE) Credential in Manufacturing, or one of the old Industrial Tech credentials (though a Designated Subject credential in Building Construction might also potentially work). However, there is room to grow and change this course. The lab in which it is taught has woodworking equipment, welding equipment (not currently being used), CNC mills, routers and other machines, a 3d printer and 2 laser cutters. 

Burlingame High School's schedule has periods 1-7 on Mon, Tues, and Friday, and block days Wed/Thurs, so the teacher would likely have (and could request) one day off (either Wed or Thurs). Yes, you are correct that the salary range listed is for full time positions.