Your Digital Classroom

I am Sudhir Sahasranaman and along with my co-founder, Tejaswini Uma Sudhir, I help students unlock their full potential through top quality explanation videos, test papers and books.

Numbers Speak

Lakh YouTube Subscribers

Years of creating All-India Toppers

Subjects Covered

Videos Created

Students Mentored

Course Rating (out of 5)

Now Available : 60 English Essays for ISC with Sudhir Sir

This book of 60 essays for Class 11 and 12 students authored by Sudhir Sir is a must-have for every ISC student, teacher and library. It is a detailed guide on how to approach essays, the kind of content and writing style. The 2025 CUET exam paper used an essay as Reading Comprehension passage - testimony to the quality and popularity of the book. All the sample essays are written in lucid language and will help students achieve success in exams.

Now Available : Write English Right

This book of 100 compositions, letters, notices and e-mails is for students of ICSE classes 9 and 10. The book to be released in the first half of July 2025 will explain how to write quality essays, letters, notices and e-mails; how to avoid common mistakes and how to score big in the English Language examination. This book is also a must buy because four topics in the 2025 Board exam were part of the earlier edition of our Book of Essays and Letters.

What People Are Saying

"Dear Sudhir Sir, My son Ronel has secured 93% in ICSE 10th exam. He had no tuition, depended only on your online class and Test paper series. I am writing this to share our gratitude to you on behalf of my family. Warm Regards. Thank You very much Sir."

— Melvin Jacob

"Dear Sudhir Sir, I am feeling highly grateful and obliged that I have scored 98.2% in my ICSE Board Examinations due to your guidance and efforts. I had earlier purchased the English Language and Geography Test Series and I was able to score 97 in English language, and 100 in Geography. As a member of your channel, your videos helped me in scoring 100 in History and Computer Applications along with Chemistry. Thank you sir for your support Regards, Ambish Kumar Borpuzari."

— Ambish Kumar Borpuzari

"Thank you Sir. Your guidance and the Test series, along with YouTube resources, were instrumental in helping me to score 98 in English."

— Pratham Bhuwania

"Thank you so much Sudhir Sir. A student who never wanted to open her History book, you helped me to develop interest in the subject so much."

— Stuti

"Best educator. Proper mentorship. You will be able to understand the motto of education. Also be able to get good marks in your writing skills. "

— Aabhigyan Saha

"His teaching is definitely awesome. One thing I love about Sudhir Sir is whatever he does, he does it perfectly. These few words cannot describe you. "

— Siddhartha Mukhopadhyay

"Best!! Sudhir Sir gives special attention to each and every student, trying his best to make students achieve higher marks. I am blessed!!!"

— Navdeep Singh

"Joining SWS was the best decision I ever made in my life. It has helped me immensely. Bcoz of Sudhir Sir and his guidance, I got 100 in English."

— Vanshika Singhal

"Thank you Sir ! I was able to score very well in History and English because of you. You are a great person and a fantastic teacher and mentor. "

— Khushdeep Kaur Bal

"SWS has been a blessing for me. The meticulous guidance and quality education I have received from Sudhir Sir and the expert faculty is unmatched! I scored 99% in ICSE 10th"

— Vedanti Barik, AIR 5th in ICSE 2022

Latest Blog Posts

Title	Excerpt	Action
How to write a quality Original Story Composition	To write a quality Original Story composition, you need to take care of these aspects. The st...	Read
Should I take the IPMAT?	A much-sought after course these days is the ...	Read
What are my options to NEET?	When we were kids, the only f...	Read
How to answer MCQs in English Literature	Many MCQs will not be straig...	Read

See All

Students' and Teachers' Interviews

How to study ISC Class 12 Accounts

If you have been promoted to Class 12 and will take the Board Exam in 2026, what should be your study approach to Commerce, Accounts and Economics in the ISC Board. SWS spoke Kavita Ravindranath, Senior faculty in Loyola School, Jamshedpur. SWS : The academic year has just begun and let's talk about Class 12 students. With the template of the exams gradually changing to Competency-focused questions, how challenging have the Commerce subjects become for ISC students? Kavita : No doubt the shift is demanding. But that's how a subject is to be mastered. To have a sound understanding of...

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How to study Chemistry in ICSE Class 10

If you have just been promoted to Class 10, what should be your study approach to Chemistry. SWS spoke Vijaykumar Prabhakaran Sir, senior Chemistry faculty based in Chennai. He is also the author of a book on Chemistry for ICSE students.      SWS : The ICSE academic year has just begun and it is summer vacation time for most students. How do you suggest students should use this time to study Chemistry in the holidays?   Vijaykumar Sir :  I will speak as a parent first, summer vacation is the time for everyone to relax, rejuvenate and then restart....

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How to study Geography in ICSE Class 10

If you have just been promoted to Class 10, what should be your study approach to Geography. SWS spoke Rameshwer Verma Sir, senior faculty and Board examiner. SWS : The ICSE academic year has just begun and it is summer vacation time for most students. How do you suggest students should use this time to study Geography in the holidays? Verma Sir : Start familiarizing yourself with the basic political map of India (states, capitals, major cities) and the physical map (major mountains, plateaus, rivers). Watch documentaries on natural phenomena, climate zones, and Indian regions. Explore educational YouTube channels that...

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How to study Physics in ICSE Class 10

If you have just been promoted to Class 10, what should be your study approach to Physics. SWS spoke Satish Rao Sir, Head of Department of Physics at the Kerala Public School in Jamshedpur, with a teaching experience of over 15 years. SWS : The ICSE academic year has just begun and it is summer vacation time for most students. How do you suggest students should use this time to study Physics in the holidays? Satish Sir : Studying Physics is not what I advise Students. I tell the students to understand Physics, see physics in whatever you are seeing...

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Our Faculty

Since 2019-20, when we taught our first batch of students, our students have been consistently the AIR 1, 2, 3, 4, 5, 6 in ICSE 2020, 2022, 2023, 2024, 2025. Add to that several school, city, district, state toppers, making their parents, grandparents, siblings and teachers proud.

What makes SWS different from any other platform?

Our explanation videos are not summary videos with shortcuts.
Each concept and chapter is explained in detail.
Many teachers admit watching SWS videos before teaching the same lesson in class.
From 2021 to 2025, every student's doubt was addressed — often better than in school.
Parent and student testimonials show the deep impact on academic success.
Our Test Papers often predict actual board questions and teach ideal answer formats.
They are higher quality than other market resources and are freshly created each year.

Tejaswini Uma Sudhir

MBA (PGDM-BM), XLRI Jamshedpur (2025–27)

99.9 percentile in XAT 2025

B.Tech (CSE), Shiv Nadar University

97.6% in Class 12

97.2% in Class 10

Sudhir Sahasranaman

Chevening Scholar, Cardiff University, UK

All-India Topper – IIMC Entrance

M.A English Literature & Political Science, DU

Author – Saina Nehwal Biography, ISC/ICSE books

Channel Founders

Tejaswini Uma Sudhir & Sudhir Sahasranaman

📩 For Collabs:

rollnumber2601@gmail.com

Your Digital Classroom

Numbers Speak

Now Available : 60 English Essays for ISC with Sudhir Sir

Now Available : Write English Right

What People Are Saying

— Melvin Jacob

— Ambish Kumar Borpuzari

— Pratham Bhuwania

— Stuti

— Aabhigyan Saha

— Siddhartha Mukhopadhyay

— Navdeep Singh

— Vanshika Singhal

— Khushdeep Kaur Bal

— Vedanti Barik, AIR 5th in ICSE 2022

Latest Blog Posts

A much-sought after course these days is the ...

When we were kids, the only f...

Students' and Teachers' Interviews

How to study ISC Class 12 Accounts

How to study Chemistry in ICSE Class 10

How to study Geography in ICSE Class 10

How to study Physics in ICSE Class 10

Our Faculty

Tejaswini Uma Sudhir

Sudhir Sahasranaman

Channel Founders