Pre-heat your oven to 350˚
In a bowl combine the flour, oats, brown sugar, baking soda, salt, and butter
Cut the cold butter in small chunks, and toss with the dry ingredients
Use a pastry blender or two knives to cut the butter in, keep working until it resembles crumbs
Measure out 1 cup and set aside
Press the remaining crumbs in a 9X13 pan
Spread the jam over the top of the base layer
Sprinkle with the fresh berries
Crumble the remaining crumbles over the berries
Bake for 35-40 minutes or until the top is lightly browned and the bottom crust is set (you can give it a little poke with a knife to test it)