Combine strawberries and sugar, let stand about 20 minutes, stirring occasionally. Combine pectin and water in a small saucepan. Bring to a boil; boil 1 minute, stirring constantly.
Add pectin to fruit mixture; stir 3 minutes. Ladle jam into freeze jars, leaving 1/4 inch head space. Adjust two-piece caps. Let stand at room temperature until set, up to 24 hours. Label and freeze.
Servings: 6 half-pints