The impetus for the arts integration is a growing body of research that demonstrates how learners experience success when taught why and how to use music, visual art, drama/dance, theatre and the literary arts to both express and understand ideas, thoughts and feelings. Critical Links, a compendium published by the Arts Education Partnership (AEP), includes 62 studies which examine the relationship between arts learning, academic achievement, and social development of students. Highlights include studies which explore the use of drama to increase students' reading comprehension and studies which examine the relationship between music and math concepts. The Arts Education Partnership has also published The Third Space, which profiles ten arts-integrated schools across the United States.