Scholastic Intervention System. Education is one of the primary objectives of Lambda Pi Upsilon Sorority, Latinas Poderosas Unidas Inc. The Scholastic Intervention System (SIS) was created to provide tutoring services to women who are enrolled in a 2 or 4-year collegiate institution that are interested in pursuing membership into the organization and have a desire to enhance their educational abilities. Through a variety of guidance conferences and extensive amounts of dedication, our tutors are fully knowledgeable in their area of expertise. The women of Lambda Pi Upsilon take pride in their educational proficiency and have come together to formulate this program in an effort to enhance our Educational Principle all throughout the Hermandad.