Yes, English speaking courses can certainly assist with exam preparation for language proficiency tests such as the International English Language Testing System (IELTS) or the Test of English as a Foreign Language (TOEFL). These specialized courses are typically designed to help non-native English speakers improve their language skills across various areas assessed by these exams, including speaking, listening, reading, and writing.

The effectiveness and success rates of these courses can vary based on several factors:

1. Quality of the Program: Courses offered by established language schools or experienced educators with a track record of preparing students for IELTS or TOEFL tend to be more effective.

2. Curriculum and Materials: Courses that provide up-to-date and exam-focused study materials, practice tests, and strategies for tackling exam questions can greatly benefit students.

3. Instructor Competence: Qualified and experienced instructors who understand the nuances of the exams can give students the skills and confidence needed to succeed.

4. Student Commitment: The success rate is also contingent on the student’s dedication to studying and the amount of time they invest in preparation outside of the classroom.

5. Course Duration: The length of the course plays a role, as intensive courses might be beneficial for quick learners or those with a strong foundation in English, while longer courses might be needed for others.

6. Adaptability: Courses that adapt to the strengths and weaknesses of individual students can provide targeted learning that addresses specific areas needing improvement.

7. **