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Class 10 Maths (NCERT Official)
  1. Chapter-1: Real Numbers-1
  2. Chapter-1: Real Numbers-2
  3. Chapter-1: Real Numbers-3
  4. Chapter-1: Real Numbers-4
  5. Chapter 2: Polynomials-1
  6. Chapter 2: Polynomials-2
  7. Chapter-3: Pair of Linear Equations in two Variables-1

Chapter-1: Real Numbers-3

Video by NCERT - PM eVidya Class 10 · 7 min

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Watch one whole course free, no account

90 courses and 5109 videos. Open any course and press play; a free account opens the rest.

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Class 10 board prep: NCERT maths and science

NCERT's own videos, chapter by chapter, with a short test after the course.

Open Class 10

Plus: a person picks your videos for ₹99

Hand-picked playlists for your class, subject and goal, in order, with a reason for each.

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Cloud and AI certification courses, complete

ExamPro's full AWS, Azure, Google Cloud, Terraform, GitHub and AI courses: every video, in order, with a test at the end.

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Teach on SkillSpring

Write a lesson once; students get it step by step, on a phone, with a quiz. Teacher accounts are approved by a person.

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Video lessons from

NCERTNPTEL · IIT Bombay, Delhi, MadrasExamProMagnet BrainsAmrita Skills for LifeElectrician UThe Engineering MindsetGCFLearnFreeCrashCourseTelusko

Every video plays from YouTube with the creator's own player. SkillSpring adds the order, the tracking and the tests.

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Picked by hand for first-time visitors. Press play; no account needed for your first course.

12 videos

Class 9–10BeginnerEnglish · Hindi

Class 10 Maths (NCERT Official)

Real numbers, polynomials, linear equations and quadratics — from NCERT.

4.5 hFree

Videos by NCERT - PM eVidya Class 10

12 videos

Class 6–8BeginnerHindi · English

Class 8 Maths: Ganita Prakash

Number Play, the distributive property, and every “Figure it Out”.

7.5 hFree

Videos by Magnet Brains

34

Class 1–5BeginnerEnglish · हिन्दी subtitles

Fractions Made Visual

See it, slide it, understand it.

3 hFree

Interactive · Ananya Rao

10 videos

Study & career skillsBeginnerEnglish

Study Skills: Notes, Memory and Exams

Ten short videos on how to actually study — for any class or college.

1.5 hFree

Videos by Thomas Frank

A quiz after each video

Answer, then read why. The wrong options get an explanation too, so a miss teaches something.

  • Five questions per video course, written from the course itself
  • Instant feedback with the reasoning, not just a tick
  • Your misses go to a mistake notebook for later
See the practice centre →
The Human Heart · Lesson 1 of 2

Question 1 of 5

Why is the wall of the left ventricle thicker than the right ventricle?

Choose one answer

Flashcards that come back when you need them

Spaced repetition: a card you miss returns tomorrow; a card you know returns next week.

  • Cards are tied to the course you are on
  • Flip, then say if you knew it; that is the whole interface
  • Due cards appear in your daily plan
Open flashcards →
Flashcards · The Human Heart
Card 1 of 40 known

Cards you miss come back sooner. Cards you know come back later.

Notes and bookmarks beside the player

Write while you watch. Bookmark a moment and jump back to it from any device you log in from.

  • Notes save as you type, per video
  • Bookmarks keep the timestamp and a label
  • Both are listed on your profile and exportable
Open a course →
The Human Heart · Blood flow

Saves as you type when you are logged in. Try editing it.

Bookmarks

  • 2:14Four chambers
  • 5:40Valves open one way
  • 8:02Double circulation

A timed test when the course is done

The server holds the clock, so a refresh or a dropped connection never costs you time.

  • Answers save automatically, question by question
  • Mark questions for review and come back
  • Results show the topics to revisit, with full explanations
See the tests →
Fractions · Mock test 09:41

Question 5 of 10 · 1 mark

Which fraction is equivalent to 2/3?

  • A3/4
  • B4/6
  • C2/6
  • D5/6
Save & nextMark for review

Navigator

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  • Answers save automatically
  • Timer set by the server
  • Full explanations after

Ask under the lesson, get a real answer

Questions, tips and issues sit under every video. A reply from the team carries a verified badge.

  • Threads are grouped so tips do not bury questions
  • Admin replies are checked by the server, not a label anyone can add
  • Pinned answers stay at the top
How discussion works →
Mobile Repairing Course · Day 7: Capacitor
R

Rahul · learner

How do I know if a capacitor is dead without removing it from the board?

S

SkillSpring team Verified

Switch the phone off and set the multimeter to diode mode. A good capacitor shows a rising reading that settles; a shorted one reads near zero both ways. Day 8 shows this on the board at 6:10.

Replies from the team carry a server-checked badge, so you know who answered.

Works on the phone you already have

The same tools in the mobile browser. Nothing to install, and the layout is built for a small screen first.

Made for small screens
Player, notes, quiz and syllabus fit a phone. Resume where you stopped.
Hindi and English
Courses in both; filter the catalog by the one you want.
Text size and motion
Scale the text, reduce motion, pick a theme under Profile. Your settings stay.

Pricing

Everything is free. Plus pays for a person to pick the right videos for you.

Two plans. One is free forever.

Free

₹0

forever

Plus

₹99

30 days · about ₹3 a day

Learning

  • Every course and video, in order

  • Resume where you stopped, on any device

  • Notes, bookmarks and the quiz under each video

  • Flashcards, mistake notebook, topic mastery

  • Lesson discussions

Guidance

  • Picks for you: the right videos for your class, in order, with a reason

    First pick

    The whole path

  • Study plan: every video and test placed on a day until your exam

    Next 2 days

    To your date

  • Revise before you forget: videos come back a week later

  • Monthly report card, printable, written for a parent

    Headline numbers

    Full report

  • Timed test after every course, certificate when you pass

  • Answers to your questions from the SkillSpring team

Pay by UPI. A person checks the payment and switches Plus on, usually within a few hours. No card, no auto-renewal. Details

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Questions people ask

The short answers. Anything else is in the Help Center.

Do I need to pay to start?
No. Every course is free, and you can watch one whole course without even signing up. A free account unlocks all courses, notes, bookmarks and discussions.
What does Plus (₹99) give me?
A person picks the best videos for your class, subject and goal and puts them in order, so you stop searching YouTube. Plus also plans your study day by day to your exam date, brings back videos a week later so they stay in memory, gives you a printable monthly report card, a timed test after each course with a certificate when you pass, and answers to your questions from the team. It's ₹99 for 30 days.
How do I pay?
By UPI. Scan the QR code or tap “Pay with UPI app”, then paste the transaction reference from your app. A person checks it and switches Plus on, usually within a few hours. No card, no auto-renewal.
Can I learn on my phone?
Yes. Lessons, practice, flashcards and exams are designed mobile-first and work on phones, tablets and laptops.
What if I miss a day?
Nothing bad happens. Streaks are optional and you can hide them. Your progress is always saved so you can pick up where you left off.
How are exams timed?
The server sets your deadline when you start, so refreshing the page or losing connection doesn't reset or shorten your time. Answers save automatically.
Can I choose video, reading or visuals?
Yes. Each lesson lets you switch between visual steps, reading mode and video (where available).
Is SkillSpring accessible?
We aim for WCAG 2.2 AA: keyboard navigation, captions and transcripts, alt text, adjustable text size, reduced motion and dark mode.

Your first lesson takes about ten minutes.

Free account, no card, progress saved from the first tap.

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