The English Grammar Tenses Collection: a huge collection of stories and exercises available for you, completely free of charge. You can read the stories online, download the story PDF files, print and use them by yourself or with your students, and check the answers using the answer key. http://www.really-learn-english.com/english-grammar-tenses.html
Free printable story and worksheets to practice the English Past Perfect Tense (comprehension, vocabulary, and grammar). This is a PDF file that you can download and print for an easy ESL classroom lesson.