This resource website for the IPAL project provides a free and open-source Moodle module to support in-class student polling. This module provides a web-based interface for teachers and students engaged in peer instruction or other classroom quizzing and a database of ready-to-use, peer reviewed questions. Students can use cell phones, laptops, other web-enabled devices, and clickers to respond to in-class polling questions. A goal of the IPAL project is to determine if an analysis of student response patterns during polling sessions may allow an early identification of students who are at risk of dropping a course or dropping out of school.