TKT shows how you are developing as a teacher. It is ideal for people who want to prove their teaching knowledge with a globally recognised certificate. TKT is a flexible series of modular teaching qualifications, which test your knowledge in specific areas of English language teaching. You can take as many modules as you want, over any time period. You receive a Cambridge English certificate for each module you complete. After taking TKT, you can take other Cambridge English teaching qualifications such as DELTA. TKT (Teaching Knowledge Test) is a series of modular tests. You can take each test individually and decide how and when you take the tests.