For this portion of the sew-along please have ready the front, back, sleeves, and neckband pieces.
Finish the raw edge of the front and back hem using a serge or zigzag stitch.
Fold the hem to the wrong side of the front at 3/4" (1.9 cm). Press.
Pin in place.
Using a single straight stitch, or double needle straight stitch, sew the hem in place. Repeat for the back hem.
TIP: Before folding the hem, make a basting stitch along the hem allowance line, using a straight stitch and long stitch length. This will make it easier to fold along the curved edge of the hem. Instead of using pins, use fusible tape to keep the hem allowance in place.
With the right sides together match the front and back at the shoulder seams. 
Pin and stitch. Finish the seam allowances together and press towards the back.
Variation 1 Henley Neckband:
Fold the neckband in half with the wrong sides together aligning notches. Press.
Variation 2 Scoop Neckband: 
With the right sides together, match and stitch along the short edges of the neckband so that the strip of the neckband becomes a loop. Press the seam open. 
Fold the neckband in half with the wrong sides together aligning notches. Press.
All variations:
With the right sides together match the neckband to the neckline. Stitch. Finish the seam allowances together.
Variation 1 Henley Neckband:
The center front most edge of the neckband should extend past the placket about 5/8" (1.6 cm).
Fold the corner to the wrong side of the placket and wedge it under the seam allowance. Give it a good press. 
Topstitch along the front neckline to keep the neckband seam allowances in place. Use a long straight stitch or a zig-zag stitch.
Add twill tape or bias binding to the back neck and shoulder seam allowances following the instructions.
With right sides together and notches aligned, match and sew the sleeves to the armholes. Finish the seam allowances together. Press the seam allowances towards the body.
With right sides together, notches and underarms aligned, match the front and back together at one side seam. Sew the seam using a zig-zag, stretch stitch, or serge. Press the seam allowances towards the back.
Hem the sleeves.
Tack down the side seam allowances at the hem.
Make sure to trim all threads and give your garment a good press. 
May 17, 2022 — Morgan and Matthew Meredith