Link: https://www.routledge.com/rsc/downloads/Second_language_learning_and_language_teaching_styles.pdf?srsltid=AfmBOoo3C7KGr_J5MP_FV_oaHKc13LV0ET7r8fQ3er_stxFS0Ha2DBm6

Title: Translation in Language Teaching
Author: Guy Cook (2010)

Type: Book
Summary: He asserts that translation is a natural and powerful language skill, central to how bilinguals and language learners process meaning. Drawing on research, classroom practice, and historical perspectives, Cook defends translation as a valid, purposeful activity that fosters accuracy, critical thinking, and linguistic awareness.

Link: https://booksreadify.com/download/translation-in-language-teaching-guy-cook-4942842

Title: Principles and Practice in Second Language Acquisition

Author: Stephen D. Krashen (1982)

Type: Book
Summary: While not directly focused on L1, Krashen acknowledges the potential role of L1 in lowering affective filters and clarifying difficult concepts. L1 use can aid comprehension and reduce anxiety, especially at early learning stages.
Link: https://www.sdkrashen.com/content/books/principles_and_practice.pdf

Type: Teaching Methodology Textbook
Summary: Harmer presents a balanced view, recognizing both the risks and benefits of using L1 in class, especially for classroom management, grammar clarification, and vocabulary.
Encourages conscious, limited use of L1 where appropriate for learning outcomes.

Link: https://coljour.wordpress.com/wp-content/uploads/2018/09/jeremy_harmer_the_practice_of_english_language_teaching_4th_edition_longman_handbooks_for_language_teachers.pdf