Preheat oven to 375 degrees. In small bowl combine flour,baking soda and salt. In large bowl combine butter,sugar,brown sugar and vanilla extract . Beat in eggs. Gradually add flour mixture. Stir in chocolate chips Semi-sweet. Drop by teaspoon onto ungreased cookie sheets. Bake at 190ºC or 10 to 14 min.. Makes about 5 dozen 2.25 cookies.