I suppose that my strawberry jams are really more like preserves. I leave smaller berries whole, and only cut larger ones in half. And of course, I like my jams cooked just long enough so that they have jelled but are still fluid. This takes a lot of practice—I am anti-commercial-pectin, as you may know—but is well worth the effort for a perfect, versatile product.
1 ¾ cups sugar