This document certifies that Tajana Tusek attended and passed a 120-hour CELTA (Certificate in English Language Teaching to Adults) course from October 5-30, 2015 at International House Belgrade Syllabus. The course included collaborative lesson planning, peer observation, feedback, and 6 hours of individual teaching observed and assessed by experienced trainers. Tajana's areas for development included varying interaction for writing lessons, while her areas of achievement involved using authentic materials efficiently and designing excellent student-centered tasks. Her overall performance met nearly all CELTA criteria early in the course, demonstrating in-depth focus on the target language and efficient practice and feedback.