Here are 10 powerful IELTS phrases that can help improve your students’ scores in both the Writing and Speaking segments by adding coherence, formality, and a range of language:

1. In light of this – Use this to introduce an explanation or reasoning based on previous points.
   “In light of this, we can conclude that… “

2. It is widely acknowledged that – Helps to introduce common opinions or widely accepted facts.
   “It is widely acknowledged that climate change is a global issue.”

3. On the other hand – This phrase helps to present contrasting ideas or viewpoints.
   “On the one hand, technology has improved communication, but on the other hand, it has decreased personal interactions.”

4. Given these points – Useful in concluding an argument or summarizing key ideas.
   “Given these points, it is clear that education reform is necessary.”

5. In the same vein – Use this to connect similar ideas and provide coherence.
   “In the same vein, public transport improvements are essential for reducing traffic congestion.”

6. To put it another way – This phrase is excellent for paraphrasing or simplifying complex ideas.
   “To put it another way, the benefits of exercise far outweigh the disadvantages.”

7. By contrast – Use this for comparing two things in a formal manner.
   “By contrast, rural areas have slower economic growth compared to urban centers.”

8. For instance/For example – Helpful in providing specific examples to clarify points.
   “For example, regular exercise improves not only physical health but also mental well-being.”

9. Nevertheless/Nonetheless – Great for presenting an unexpected result or contrasting point.
   “The economy is improving; nevertheless, unemployment rates remain high.”

10. This underscores the importance of – A formal way to emphasize a point or conclusion.
    “This underscores the importance of investing in renewable energy sources.”

These phrases will add clarity, structure, and a higher level of formality to their responses, which examiners are looking for in both IELTS Writing and Speaking.