Time Allotment, Overview and Instructions
Estimation for a class of 20 students or more over a period of one hour minus roll call, etc. Total time = 45 minutes each day.
Day One: Explain the project and have the students set up their machines. This involves threading the machine and putting in a new needle. Also, check all settings to be sure each machine is ready to sew a solid straight stitch. Set the tension on the four setting. You can have the students do test runs on scrap pieces of the denim fabric. Adjust the tension accordingly.
Day Two: Cut the bag out as described in the pre-assembly instructions and iron down the top one inch edge of the bag. Next, you will be ironing the straps in half with another 1/2 inch on each side ironed down. What you end up with is a clean folded edge on your straps. (This can be completed only if you have stations already set up for ironing and sewing. Also the machines must be set up and ready to go).
Day Three: Sew or serge the side seam (there is only one side seam on this bag). You find the side seam by folding the bag in half along the 27 inch sections making it half that. You will want to fold it right sides together. Now you can sew this side seam and across the bottom of the bag.
Fold the bottom corners of the bag to form a triangle, and sew across the corner to make a flat bottom. You accomplish this by making the side seam meet up with the bottom seam. You will then notice the bottom comes to a point. You will sew straight across the point about 2-1/2 inches from the point. This does not have to be exact science to work, but each side needs to be sewn the same distance from the point. You can cut off the corner or leave it. If you cut it, you should have your students serge or zigzag over it.
Day Four: Finish the top edge that folds down with either a zigzag or serge on the edge, so it doesn't fray. Stitch the handles together by topstitching along the edge that is open (they are already ironed as of day two). This will consist of four layers of material, the strap itself and the two folded under edges. Because of this thickness you may need to go with a longer stitch length and sew a bit slower, so instruct the students of this issue.
After you have your handles ready to put on the bag, you place them over the folded down top edge, placing them on the inside of the bag 3-1/2 inches from the side seam on center. Pin them in place. The bottom edge of the strap should align with the folded down edge of the bag. This translates to putting the strap 1/2 inch down from the top of the bag, over the folded down edge.