TEFL Institute of Ireland
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300-Hour Level 5 Advanced Diploma TEFL Course

  • Advanced Level 5 TEFL qualification
  • Designed for experienced or career-focused teachers
  • Internationally recognised certification
  • Ideal for long-term professional teaching careers

300-Hour TEFL Course | Ofqual Regulated | Advanced TEFL Diploma

Earn a globally recognised qualification aligned with the European Qualifications Framework (EQF), open to individuals worldwide. Regulated by Ofqual, our 300-Hour Level 5 Advanced Diploma is the highest level of TEFL certification offered by the TEFL Institute. Comparable to a TEFL Diploma of Higher Education (DipHE) or a Foundation Degree, this prestigious course equips you with the skills and expertise needed to teach English in diverse settings—whether online or abroad—with top-tier schools and organisations.

As one of the most advanced TEFL qualifications available, the Level 5 TEFL Diploma is highly regarded by employers worldwide. Its rigorous training, assessed at the same level as CELTA, demonstrates your dedication to excellence in teaching and enhances your CV, ensuring you stand out in the competitive TEFL job market.

What You'll Get

300-Hour Level 5 Advanced TEFL Diploma
Personal Tutor Support
Internationally Recognised Digital Certificate
Free Jobs Coaching Seminars
Study Using the TEFL App
Lifelong Certification & Reference Letter
6 Months Course Access
2 x 60 Hour L5 Awards in Niches of your choice
Higher Earning Potential and Career Progression

Free Certified Course Bundle worth

Included with Your Purchase


  • 30 Hour Teach English Online
  • 30 Hour Teach Young Learners
  • AI / Chat GPT Mastery Guru
  • 30 Hour Advanced Grammar for TEFL Teachers
  • 29 hrs of Weekly TEFL Mentorship (Online)

About This Course

We understand that 300 hours of study might sound like a lot. But, with 6 months to complete your course, and support from experienced tutors along the way, you’ll have everything you need to succeed. Simply log in to our online learning platform to access your course and study at your own pace. You can complete this course in 12-14 weeks. You will have 24/7 access to our online study platform, plus we have a TEFL on the go app which makes it easy to study material from your phone.

Additionally, you’ll get 29 hours of Zoom sessions, which take place every Tuesday. You’re welcome to join your tutor and other students to discuss any tutor-related questions or if you simply need help starting your course. We have all the support you need; our support is the number one reason people choose our training, alongside the quality of course content they receive.

Top 5 Benefits of this Diploma Course:

  • Employers will be highly impressed that you have undertaken and passed the TEFL Diploma, due to its prestigious reputation and detailed TEFL training content.
  • The broad range of content covered in the TEFL Diploma course will provide you with a sound knowledge of the profession and give you the confidence to teach English anywhere you want to.
  • The course includes free digital and hard copy certificates (terms and conditions apply) which means you don’t have to pay any extra fees for this, which is the case with other TEFL courses.
  • The interactive and engaging style of our course will leave you excited to log on and study your next lesson!
  • Our course also covers online teaching which is a key feature of today’s TEFL market. This means you will have up-to-date knowledge of teaching TEFL today, another thing to impress your potential employers.
Our Accreditations

HIGHFIELD QUALIFICATIONS AWARDING BODY IN THE UK

Approved Center Number: 21335

Highfield Qualifications are a global leader in compliance and work-based learning and apprenticeship qualifications and one of the UK’s most recognisable awarding organisations. The TEFL Institute is an approved training center by Highfield Qualifications, an independent Ofqual approved Awarding Organization. This means the TEFL Institute has met Highfield’s expectations for developing and delivering high quality courses in the TEFL industry. Every year, Highfield maintains evaluation visits to ensure we are consistently meeting the high standards with our training.

OFQUAL (THE OFFICE OF QUALIFICATIONS AND EXAMINATIONS REGULATION)

The Office of Qualifications and Examinations Regulation (Ofqual) is the regulator for vocational qualifications in England and Northern Ireland. Ofqual gives formal recognition to Awarding Organizations and monitors their activities. Ofqual has given approval for Highfield, the Awarding Organization (AO), to provide a wide range of regulated qualifications in varying sectors, including Education and Training.

You will gain 38 Credit Points at Level 5 (RQF) on successful completion of the 180 hour Ofqual regulated TEFL Diploma course (launched October 2021), which is more than most Level 5 TEFL qualifications. Qualification Number 610/1571/4 on the Ofqual Register.

View the TEFL Institute’s qualification status on the Ofqual Register

DEAC AQC CURRICULUM APPROVED CENTRE

DEAC is a prestigious accrediting agency based in the United States. Its Approval Quality Curriculum (AQC) status signifies that a program or course has met its rigorous quality standards. For our Level 5 TEFL Courses, DEAC approval means that our curriculum, assessments, and overall standards align with those set by US educational authorities. AQC stands for Approved Quality Curriculum. It is a status granted by DEAC to signify that a particular curriculum or course offered by an educational institution meets the rigorous quality standards set by DEAC. Essentially, AQC indicates that the curriculum has been thoroughly reviewed and approved by DEAC for its quality and adherence to educational standards.

At The TEFL Institute, we proudly announce that our Level 5 TEFL Courses have received approval from DEAC, the Distance Education Accrediting Commission. DEAC’s AQC designation signifies that our courses meet stringent quality standards, ensuring that our students receive the highest quality education in the field of Teaching English as a Foreign Language (TEFL). This approval underscores our commitment to providing exceptional TEFL training that meets global standards of excellence.

OTCAC – Online Teaching Course Accreditation Committee

The Online Teaching Course Accreditation Committee (OTCAC) is an independent accrediting body focused on maintaining high standards in online and learning education. It works with course providers worldwide to ensure quality, consistency, and credibility in digital learning.

The Committee’s mission is to evaluate and enhance the quality of online teaching programmes while safeguarding learners’ interests and promoting best practices in course delivery.

OTCAC sets clear accreditation standards for online education. Providers that meet these standards can apply for accreditation, demonstrating their commitment to quality, effective instruction, and student support.

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Who can take this course

  • Native or fluent in English, with strong communication skills
  • Interested in teaching English online or in non-native English-speaking countries
  • Aged 17 or older and looking to earn a professional qualification
  • Keen to get certified quickly and start teaching within a month

What You'll Learn

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300-Hour Course Guide

300-Hour Course Guide

Learn more about this course, inside this guide is a description of each module, student feedback & comparison with our other TEFL courses.
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Why us

World-class TEFL courses and training
24/7 access to your course on any device
Best tutor support
Lifetime access to the TEFL Institute Jobs Board

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TEFL On The Go

Learn anytime with the TEFL Institute of Ireland's accredited mobile app. Flexible, interactive, and trusted.

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Got Questions?

Get clear answers about TEFL courses, certification, teaching jobs, and everything in between.

Yes. You can complete the course fully online from anywhere in Ireland. It’s a flexible option for those balancing work, college, or family while working towards a serious teaching qualification.

This course is ideal for people who are not just “trying TEFL”, but planning to teach long-term. If you’re aiming for better schools, stronger contracts, or more stable career outcomes, the additional hours and depth are worth it.

You can take this course as a non-native English speaker, as long as your written and spoken English is at B2 level or above. Because this is Level 5 training, you should feel comfortable reading course content, writing assignments, and using professional teaching terminology. Test your English Level today and see if you can complete this course. This test is free of charge, and you can check it here: English Level Test.

Yes. Use the comparison table below to see what each course is designed for, how long it takes, and what makes it different.

TEFL Course Comparison: Compare our course pathways to find the option that best matches your goals, timeline, and confidence level.

Course Best For Course Type Ideal For Study Time Key Difference
120-Hour TEFL Course Beginners Fast-track Adventurers 2–4 weeks Entry-level qualification, ideal for online teaching and first-time roles.
240-Hour Professional TEFL Course Career switchers Professional certification Digital professionals 4–6 weeks 120-hour TEFL plus 4 specialist courses to boost employability.
180-Hour Level 5 TEFL Diploma Confident beginners High-level certification Long-term planners 6–8 weeks UK-regulated Level 5 qualification with stronger recognition and better job prospects.
300-Hour Level 5 Advanced Diploma Higher-paid roles Premium certification Teaching leaders 8–10 weeks Level 5 Diploma plus advanced specialist training for long-term career growth.
190-Hour Hybrid Level 5 TEFL Course Career-ready teachers Employer-ready training Classroom confidence 6–8 weeks Level 5 Diploma plus a 10-hour live teaching practicum (via Zoom) to build confidence.
310-Hour Hybrid Advanced Diploma Advanced TEFL careers Premium hybrid Global teaching careers 8–10 weeks Highest-level pathway: Level 5 Diploma, live practicum, and niche specialisations.
10-Hour Practical Teaching Course Confidence seekers Add-on practicum Classroom experience 1 day Live practical teaching to gain real classroom experience and confidence.

A Level 5 qualification sits on the UK Regulated Qualifications Framework (RQF). In practical terms, it means the course is structured and assessed to a recognised academic level, and it’s widely trusted by employers and institutions internationally.

Ofqual is the UK government body that regulates qualifications. Highfield is the awarding organisation that issues the regulated qualification. When learners see both names, it’s a signal that the course is independently quality-assured rather than self-declared by a provider.

Yes. A Level 5 diploma is widely recognised internationally. While different countries and employers have different hiring requirements, a regulated qualification generally carries stronger credibility than low-cost certificates.

The 300-hour course is designed as a premium pathway. Alongside your Level 5 training, you receive additional advanced specialist learning to increase employability and teaching confidence, especially if you want to teach online, teach specialised learners, or move into higher-level roles.

Most learners complete the 300-hour course in 8–12 weeks when studying part-time. If you have more time available, you can move faster, as the course is self-paced.

For long-term careers, yes. A 120-hour TEFL certificate is a good entry point, but the 300-hour option is designed for higher confidence, broader knowledge, and stronger job applications—especially in competitive markets.

Yes. The more advanced your training, the easier it is to position yourself for higher-quality online roles. The 300-hour option also helps if you want to target niches like exam preparation or professional learners.

Because one size does not fit all. Some learners want to qualify quickly, others want a regulated diploma, and others want advanced training and stronger career prospects. Our packages are built to reduce the need for add-ons later and help you choose a complete pathway from the start.

Absolutely. If you answer a few quick questions or book a free call, our team will recommend the best course based on your goals, timeline, and confidence level.