This Powerpoint slideshow presentation is a content-based grammar lesson on Relative Pronouns. The lesson based off the Pearson Longman Keystone Level D Student Textbook. The content of the lesson is the Science informational text titled "Getting to Know Real Bats." This lesson is designed to instruct High School ESOL students with a High Beginning or Intermediate English language proficiency level in grades 9-12. Pearson Longman Keystone Level D Workbook page 213 is required to incorporate the homework component of the lesson.