Rhubarb Crunch (Easy and Delicious)

1 c. sugar

3 T. flour

1 c. oatmeal

1/2 c. butter

4 c. rhubarb, cut up

1 c. brown sugar

1-1/2 c. flour

1/2 c. shortening

Combine rhubarb, sugar and 3 tbsp.flour.  Place in greased oblong cake pan.  Combine brown sugar, oats and 1-1/2 cups flour.  Cut in butter and shortening; sprinkle over rhubarb.  Bake at 375 degrees for 40 minutes or until golden brown.