Welcome to Proficiency Lab. Change the way you English!

Monthly proficiency-level English lessons for C1/C2 Speakers.
Refine your skills and keep your English at its very best.

You speak English well, and now it’s time to go beyond the plateau. Proficiency Lab keeps your skills sharp, your mind challenged, and your language evolving through stimulating, authentic content and expert guidance.

APPLY NOW!

ADVANCED ENGLISH PROFICIENCY ONLINE COURSE

For language lovers who want more than “good enough.”

If you can think, work, and live in English with ease, you’ve already reached a level most learners only dream of.

But you know that languages are like muscles and without regular challenge, they weaken.

Hi! I’m Kerin, and I created Proficiency Lab for advanced speakers (C1/C2) like you:

you want to keep your English fresh, natural, and nuanced
you want to enjoy learning for the sheer pleasure of it
you love exploring big ideas, discussing them in depth, and polishing your English along the way

Proficiency Lab is your monthly practice space:

structured enough to keep you progressing
flexible enough to fit your life
engaging to make you look forward to every session

ADVANCED ENGLISH PROFICIENCY ONLINE COURSE OVERVIEW

What is Proficiency Lab?

Proficiency Lab is an advanced English proficiency program built around authentic materials,
stimulating discussions, and personalised feedback.

Here’s how it works:

Skill Builder (self-study)

At the start of each month, you get a carefully chosen podcast, article, TED Talk, or video. Something engaging. Something thought-provoking. Something worth talking about.

Live Session on Zoom

We meet once a month online for rich discussions where we explore themes, dissect ideas, and look closely at the language in action. The small-group interactive exchange gives you the chance to practise your English in real time, keep it alive and evolving, refine and elevate your expression, all while making meaningful connections with others.

Study Pack & Personalised Feedback

You get quizzes, writing prompts, and vocabulary tasks to review and recycle everything you learn, all with personalised corrections so you can fine-tune your English exactly where it matters.

This is about enjoying English while ensuring you’re always improving, never stagnating.

What my students say

❝ Every month, I get excited when I check what Kerin prepared for us this time. Because every month’s topic is different and it can cover politics, business, celebrity’s life story, travel etc, For me its not only learning and improving my vocabulary as well as i’m obtaining variety of knowledge in different areas.❞

Tuya

❝ Keep working on your English when you’re at a B2-C1 level is quite challenging because the majority of courses out there are designed for beginner or intermediate levels. On the other hand, attending conversation clubs and chit-chatting with friends or speaking partners, although useful, lacks the feedback and accountability that structured programs do offer.
I found in Kerin’s classes the answer to both of these conundrums. Not only do we discuss authentic, real-life English, but also I get invaluable feedback on my speaking and writing skills. The topics we work on are relevant and engaging and Kerin puts together activities that set you up for success. ❞

Rocio

“I absolutely love the topics Kerin prepares every month! I can’t wait to see what’s next!”

Sara

“I joined Proficiency Lab to keep my English active, but it’s done more than that. It’s made me fall in love with English all over again.”

Maria

100% verified reviews: real students, real experiences
Read more reviews on Trustpilot and Google

Why It Works

Languages stay alive with challenge and variety. Proficiency Lab gives you both.

By engaging with real-world English, you’ll:

Keep your skills active and evolving
Expand your vocabulary in ways that feel natural
Gain a deeper appreciation for the subtleties of expression
Enjoy English as a living, breathing part of your life

APPLY NOW

Go beyond the plateau-
keep your English at its very best!

Choose Your Commitment

Advanced English Proficiency Course Core plan

3 month access
€70

Advanced English Proficiency Course Extra plan

6 month access
€130

Advanced English Proficiency Course Mastery plan

12 month access

€220

APPLY NOW

Prefer a One-to-One Experience?

With the Proficiency Lab Private option, you’ll enjoy everything included in Proficiency Lab, but instead of a group live session, you get a private lesson with me each month.

That means more focus, more flexibility, and the chance to refine your English in a way that’s 100% tailored to you.
Price: €45/month

Apply now

Everything you need to know

Click the icons to read the FAQs

How does Proficiency Lab work?

Each month you’ll get regular activities to do:

1. At the beginning of each month you’ll access the Skill Builder in the platform. This is a carefully curated task designed to immerse you in authentic English and strengthen your listening and reading skills.

Before our live session, you’ll complete the assignment, preparing yourself for a rich, interactive discussion.

2. Monthly live session led by Kerin: engage in meaningful conversations with other advanced speakers and expand your vocabulary with sophisticated expressions to achieve proficiency.

Together we will:
○ Analyse the material in-depth, exploring its vocabulary and themes
○ Break down the nuances of language use
○ Engage in dynamic discussions to challenge critical thinking skills and improve your speaking confidence

3. Study pack and Feedback: after the session, the learning continues with the Study Pack. You will find quizzes, writing tasks, and vocabulary exercises. Say goodbye to wondering if you’re “getting it right.”

The personalised feedback from Kerin will help you identify areas for improvement, build your vocabulary, and refine your expression.

Plus, enjoy the archives and exclusive member discounts! (As a Proficiency Lab member enjoy discounts on Book Lab, on-demand courses and individual lessons)

What is Proficiency Lab PRIVATE?

Proficiency Lab PRIVATE* works exactly the same as the group classes (please see question above) with the exception of the live session. Instead of joining the group session, you will book a private session with Kerin directly. The private session will last 55 minutes.

*Cancellations: you may cancel a lesson with 24 hours notice. In case of cancellation less than 24 hours in advance, the lesson is not refundable or recoverable and will be considered as done.

How do I join?

Joining is easy! Start by filling out this short application form to become a member. After that, you’ll have a quick chat with Kerin to confirm your English level and find the group that’s the best fit for your level and learning style.

When are the live lessons?

The group live lessons usually take place on the second week of each month (excluding August) and take place on weeknights between 5–8 PM (Rome time). Your time slot is assigned based on your speaking level and your availability to ensure the best group fit.

If you choose to do PRIVATE, you can book lessons directly with Kerin at a time that is convenient

Why is there only one live lesson per month?

Proficiency Lab is designed for people who want to maintain and develop their English, but who don’t want the commitment of a full course.
This works well for people who live in an English speaking country or who use English regularly, perhaps at work or in their personal life.
For other students, Proficiency Lab isn’t frequent enough, and they choose to take the Advanced General English course or combine it with another course e.g an on-demand course or Book Lab.

How do I access the Skill Builder and Study Pack?

Once you enrol, you’ll get access to the Skill Builder, Study Pack and also the library of past classes. These resources are self-paced. You can work on them whenever it suits your schedule—no fixed times, just flexible learning at your convenience!

How much does it cost?

There are different course options to choose from and you can choose a 3 month, 6 month or annual plan.
⇢ 3 months = €70
⇢ 6 months = €130
⇢ Annual = €220
⇢ Private =€45 per month

What happens if I miss a lesson?

Missed lessons are non-refundable and non-recuperable. However, don’t worry! If you miss a lesson, you’ll still have access to recording of the Virtual Classroom, along with the Skill Builder and Self-Study Pack to keep up with your progress.

When can I join Proficiency Lab?

You’re welcome to start at the beginning of any month (except August), as long as there’s space available. We’ll do our best to find the perfect spot for you!

Is this course right for my level?

This programme is designed for adults with advanced to proficient levels of English (C1, and C2).
Not sure about your level? No problem! Take my free level test or reach out to me—I’m happy to help you figure it out.

Why do I need to apply for Proficiency Lab?

To ensure the quality of the lessons, it is fundamental that you join the best group for your level. When you apply, I will contact you to book a call to verify your speaking level and decide the best group experience for you.
Apply here

Apply Now

Keep your love of English alive!

Hi, and thanks for your interest in Proficiency Lab!
To make sure you join the right group, I ask a few quick questions for group placement.