I taught 11th grade economics for 6 years and developed this step-by-step explanation of supply for teachers to use in a classroom. It is really useful for general economics classes, as well as honors, AP, or college level economics. It would also be useful for homeschool students.
The first few slides explain the difference betwen demand and supply. I found this helpful as a teacher, as students often answered the supply questions with answers that had to do with demand.
Several supply vocabulary words are defined, including input, output, supply schedule, supply curve, law of supply, costs, fixed costs, variable costs, price.
There is an entire section on costs--including operating costs, the difference beween costs, revenue, and profit--including easy to follow charts.
Change in quantity supplied and change in supply are explained in a lot of detail--including the SPENT variables (which are adapted from another source... you can see the other download of "Shifts of Supply Curve.")
There is an entire section on the Government's influence on supply--including subsidy, excise tax, and regulation.
There are are several slides that help students to review information, in addition to practicing the learned information.
All pictures are cited in the notes section of the corresponding slide. Additionally, activities, how to explain material, and cited information is also located in the notes section of slides.
*** I am in the process of updating my economics information. Become a follower and know when I update more resources :)