You will need:
A scrub top pattern that you like (aside from the neckline finish!)
A bit of extra fabric for binding. You'll probably have some scraps that will be plenty large after you cut out your scrubs. You can skip all of the "making the binding" steps if you find commercial bias tape that is a color and width you like, but I wanted a fabric match and a different width, so I'm including the how-to for that.
Chalk for marking
Fabric glue stick or basting tape
First you need to prep your pattern. Since you will be binding the neckline, you want both back and front necklines to be at their finished height. That is, remove any seam allowances for facings.
Now make the pattern for your bindings. For the back, cut out a rectangle that is the length of your back neckline plus an inch or two for shaping, and four times the finished width. For example, my back neckline is 9 inches long, and my finished binding width is 3/4 of an inch, so my back binding is 10 1/2 inches long and 4 inches wide. For the front binding, you will need two pieces (one for each side of the V), the length should be a little more than the length from the shoulder to the point of the V, and the same width as the back. Remember that you will be cutting these out on the bias so that they will stretch and conform to the curve of your neckline.
Once you've cut out all of your pieces, you need to prep your bias strips. You are basically making bias binding. I find it very helpful to starch my bias strips before folding and pressing. I think it helps to control the bias so that you don't end up all stretched out of shape. So, saturate your strip with starch, then fold it in half and press the folded edge to form a crease. (Wishing I had taken a picture here!) Unfold, then fold the two raw edges in to meet in the middle. Crease those edges and then fold it back in half. It should be looking like double fold bias tape now.
Now you are ready to apply the neckline! I do this as my first step in construction. You can do it when you want, but it does need to be done before you sew the shoulder seams.
For the front neckline, you need to form the V from your two strips. To determine the angle that you need to sew, line one piece of binding up just as it will be sewn to the neckline, then with your straightedge, draw a line on your binding along center front like so...
For the back, just glue down the binding the same way, and edgestitch it down. It curves a bit, but your tape has plenty of stretch, so just contour it as you are glueing. Afterward, it may try to curve in or out. Just press it down withe the iron and it will lie nice and flat.
As a final note, if you want your scrubs to be reversible this is the perfect neckline finish. All you have to do is add an inside breast pocket and flat fell your seams. Instant reversible scrub top!