Sharing/using other instructor's materials like videos in support of active learning .... I like this para especially: "The impact is especially great for women and others under-represented in STEM fields. Studies show that the achievement gap in STEM classes can be reduced or even annihilated for women, first-generation college students and underrepresented minority students if active learning strategies are employed. In order to make this happen in the classroom, it is effective to place some amount of foundational learning outside of class time."