In a bowl, combine crushed pretzels, melted butter, and 3 tablespoons of teh sugar. Mix well and press evenly into the bottom of a 9" x 13" baking pan. Bake for 8 to 10 minutes, until firm. Transfer to a cooling rack and let cool completely.
In a mixing bowl, combine cream cheese and remaining 3/4 cup sugar. Using and electrric mixer, cream at medium speed. Fold in whipped topping. Spread mixture evenly over pretzel crust.
in a large bowl, combine gelatin and boiling water. Stire until gelatin is completely dissolved. Add cold water. Stir in strawberries and refrigerate for about 10 minutes, until mixture just begins to thicken. Pour into pretzel crust and chill until completely set (about 3-4 hours).