Preheat oven to 375. In small bowl, mix flour, baking soda, salt and baking powder. In large bowl, cream together sugar, brown sugar, eggs, shortening and vanilla; stir in flour mixture. Fold in oatmeal, chocolate chips and nuts last. Drop by rounded teaspoonfuls onto greased cookie sheet, about 2 inches apart (we're able to fit about 12 on a regular cookie sheet, in a 3-by-4 arrangement); bake for 9-10 minutes.