Jelly, jam and preserves are all made from fruit mixed with sugar and pectin. With jelly, the fruit comes in the form of fruit juice.
With jam, the fruit comes in the form of fruit pulp or crushed fruit and is not as stiff.
In preserves, the fruit comes in the form of chunks in a syrup or a jam.
Basic Strawberry Jam
2 quarts strawberries
7 cups sugar
1 pkg Pectin [1.75 Oz.]
Wash and stem the strawberries. Crush them , small amounts at a time. Then Measure out 5 cups of the crushed berries and place in a large pot. Place the sugar in a separate bowl.
To the strawberries in pot, add the Pectin and 1/2 tsp butter.Bring mixture to a full rolling boil over high heat, stirring constantly.