Wash and hull your strawberries.
Chop the strawberries into small pieces.
Add the chopped strawberries, water, pectin, 1/2 cup of the granulated sugar, lemon juice and butter in to a large 4-5qt non-stick pot.
Cook over medium high heat, stirring and continuing to mash until it comes to a rolling boil
Add the remaining sugar, then bring back to a boil and let boil for 5 minutes.
Remove from heat and let sit for 5 minutes, then skim any froth off of the top with a spoon.
Ladle the jam in to sterilized jam jars or freezer safe containers, wipe the rims as needed, put on the tops, then let fully cool on the counter. Once cool, store in the refrigerator, (or freezer if you aren't going to use it within 3-4 weeks.)