The previous picture depicts the necessary means of meeting the needs of our special needs students. It can also provide a pathway for meeting the needs of all our students; therefore, laying the foundation for the purpose of UDL.  UDL was implemented when architectures were forced to design a structure that could assit everyone into the building.  For example, if a building had a stairs then a ramp needed to be installed in order to accomodate someone in a wheel chair.