I start with pajama pants then an apron with a more advanced technique, like tucks, darts, etc. that closes with buttons. Apron is based on the project they want to do that is adv. beginner/intermediate so they practice the technique before a project. Then whatever they want to do: dress or top usually.
This is 12-14 year olds. It gives them a project off the bat that does not have to be perfect, but is easy to succeed with, then one that is silly, but gives them the practice before they try to do it for real as it were. On the garment, we make a mock up, I work with them to figure out what needs to be done, help and explain how and then have them redo the garment in the fashion fabric.
Thing is, this is a project list that is pretty easy to alter to what they want to do. Basically, super easy project --->easy with details to practice for the final project---->final project. Assuming 2 hours a lesson, this is a 10 lesson plan, with some work at home. Usually, this runs a 12 weeks/2 week summer camp. Leaves 2 hours to adjust sew time as needed, although summer camp usually is 2 hours less, but I make myself available half an hour after class daily.
1. Intro, safety and learning the machine. Covers threading, winding bobbins, decorative stitches and let them run the samples that everyone hates.
2. Lesson on cutting terms, grain etc. Cut PJs.
3. Sew PJ.
4. Draft apron onto fabric. Saves $ for pattern, and explain some sewing history of tailoring. Also: squares and rectangles.
5. Sew apron
6. Cut muslin
7. Sew muslin
8. Fit, fix and tear apart for pattern
9. cut and sew FP
10. sew FP
If there's time left over, like an extra hour I use it as a textile class/question answer/forecasting. I've shown beginning draping before, and I've done forecasting before.