Math Worksheet Generator

I need a math application that generates formatted worksheets for use by kids in elementary school. The application will be customizable by the teacher in four areas: addition, subtraction, multiplication, and division. Among other things that must be customizable are: number of problems, font types, instructions inclusion, difficulty level, value limits, and various other things related to the specific operation. More directions will be given upon bid acceptance. These worksheets must be formatted so they print out properly and should be built using .css, javascript, .php, or flash. A online companion project will be proposed later in the year. ## Deliverables This is not actually a website, rather an application that will be placed on an existing website