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Doubtbox is the latest innovative product from the founders of eTutor, which is used by half a million students across the globe. This Interactive Digital Content Repository has 8000 animated topics and one lakh questions with answers for Classes 1-12 .

Doubtbox pen drive, an excellent tuition master at home, facilitating self learning by students, available for   Classes 1-12, based on CBSE syllabus, with effective blending of ICSE and State Boards syllabus. Once they are set up in the home computer/lap top, students can study any lesson according to their convenience and do home work easily, watching the lessons enriched with multimedia. All the topics are explained with quality animations, graphics, pictures and diagrams along with audio explanations. Students will enjoy lessons as if seeing an animated, topic-based film.

System Requirements:

  • Processor – Minimum:1 GHZ, RAM – Minimum:2 GB
  • Disk Space – Minimum 10 GB Free space
  • Screen resolution – 1280 x 720 or above
  • Operating System – Windows 7 or above

Doubtbox Features:

  • Latest syllabus
  • Animated video lessons
  • Exciting visuals
  • Audio explanations
  • Multiple choice questions
  • Assessments
  • Time bound test
  • Model test papers
  • Previous years question papers
  • NCERT solutions


Topics Covered in Doubtbox Educational Pen Drive

Chapter 1. Where does it come from?

Food Variety, Food Materials and Sources, Plant Parts and Animal Products as Food, Plant parts as food, What do Animals Eat?

Chapter 2. Components of Food

What Do Different Food Items Contain?,What do Various Nutrients do for our Body?, Balanced Diet, Deficiency Diseases, Fibre, Spinning Cotton Yarn, Yarn to Fabric, History of Clothing Material

Chapter 4. Sorting Materials into Groups

Objects Around us, Properties of Materials, Solubility

Chapter 5. Separation of Substances

Methods of Separation-Hand Picking/ Winnowing/Sieving,Threshing, Sedimentation, Decantation and Filtration, Evaporation Use of more than one method of separation, Can water dissolve any amount of a substance?

Chapter 6. Changes Around Us

Can All Changes Always Be Reversed?, Could There be Other Ways to Bring a Change?

Chapter 7. Getting to Know Plants

Herbs, Shrubs and Trees, Stem, Leaf, Root, Flower

Chapter 8. Body Movements

Human Body and its Movements- Ball and socket joints, Pivotal Joint, Hinge joints, Fixed joints,Gait of Animals- Earthworm, Snail, Cockroach, Birds, Fish, How do snakes move?

Chapter 9.The Living Organisms and their Surroundings

Habitat and Adaptation, A Journey Through Different Habitats, Characteristics of the Living Beings

Chapter 10. Motion and Measurement of Distances

Story of Transport, Some measurements, Standard units of measurements, Correct measurement of length, Measuring the Length of a Curved Line, Moving Things Around us, Types of Motion

Chapter 11. Light , Shadows and Reflections

Transparent, Opaque and Translucent objects, What exactly are Shadows?, A Pinhole Camera, Mirrors and Reflections

Chapter 12. Electricity and Circuits

Electric Cell, A Bulb connected to an electric cell, An Electric Circuit, Electric Switch, Electric conductors and insulators

Chapter 13. Fun With Magnets

How Magnets Were Discovered, Magnetic and Non-magnetic materials, Poles of Magnet, Finding Directions, Make your own Magnet, Attraction and Repulsion between Magnets

Chapter 14. Water

How much water do we use?, Where do we get water from?, Water cycle, Back to the oceans, What if it Rains heavily?, What happens if it does not rain for a long period?, How can we save Water?, Rainwater Harvesting

Chapter 15. Air Around Us

Is Air present everywhere around us?, What is Air made up of ?, How does oxygen become available to animals and plants living in water and soil?, How is the Oxygen in the Atmosphere Replaced?

Chapter 16. Garbage In Garbage out

Dealing with garbage, Vermicomposting, Recycling of paper, Plastics – boon or a curse?

Chapter 1. Knowing Our Numbers

Introduction, Comparing Numbers, Large Numbers in Practice, Using Brackets, Roman Numerals

Chapter 2. Whole Numbers

Introduction, Whole Numbers, The Number Line, Properties of Whole Numbers, Patterns in Whole Numbers

Chapter 3. Playing with Numbers

Introduction, Factors and Multiples, Prime and Composite Numbers, Tests for Divisibility of Numbers, Common Factors and Common Multiples

Chapter 4. Basic Geometrical Ideas

Introduction, A Line Segment, A Line, Intersecting Lines, Parallel Lines, Ray, Curves, Polygons, Angles,
Triangles, Quadrilaterals, Circles

Chapter 5. Understanding Elementary Shapes

Introduction, Measuring Line Segments, Angles – ‘Right’ and ‘Straight’, Angles – ‘Acute’, ‘Obtuse’ and ‘Reflex’, Measuring Angles, Perpendicular Lines, Classification of Triangles, Quadrilaterals, Polygons, Three Dimensional Shapes

Chapter 6. Integers

Introduction, Integers, Additon of Integers, Subtraction of Integers with the help of a Number Line

Chapter 7. Fractions

Introduction, A Fraction, Fraction on the Number Line,Proper Fractions, Improper and Mixed Fractions, Equivalent Fractions, Simplest Form of a Fraction, Like Fractions, Comparing Fractions, Addition and Subtraction of Fractions

Chapter 8. Decimals

Introduction, Tenths, Hundredths, Comparing Decimals, Using Decimals, Addition of Numbers with Decimals, Subtraction of Decimals

Chapter 9. Data Handling

Introduction, Recording Data, Organisation of Data, Pictograph, Interpretation of a Pictograph, Drawing a Pictograph, A Bar Graph

Chapter 10. Mensuration

Introduction, Perimeter, Area

Chapter 11. Algebra

Introduction, Matchstick Patterns, The Idea of a Variable, Use of Variables in Common Rules, Expressions with Variables, Using Expressions Practically, What is an Equation?

Chapter 12. Ratio and Proportion

Introduction, Ratio, Proportion, Unitary Method

Chapter 13.Symmetry

Introduction, Making Symmetric Figures : Ink-blot Devils, Figures with Two Lines of Symmetry, Figures with Multiple (more than two) Lines of Symmetry, Reflection and Symmetry

Chapter 14. Practical Geometry

Introduction, The Circle, A Line Segment, Perpendiculars, Angles

Chapter 1. Articles

Articles, Definite Article, Indefinite Article, Rules Using ‘the’

Chapter 2. Nouns

Nouns, Singular and plural nouns

Chapter 3. Pronouns

Pronouns, More on Pronouns, Personal Pronouns, Demonstrative Pronouns, Possessive Pronouns, Reflexive Pronouns, Indefinite Pronouns

Chapter 4. Verbs

Verbs, Kinds of verbs, Transitive verbs, Intransitive verbs

Chapter 5. Present Tense

Introduction, Present tenses, Present tense aspects, Simple present tense, Present Continuous, Present perfect tense

Chapter 6. Past Tense

Past tense aspects, Past perfect, Simple past and present perfect tense

Chapter 7. Future Tense

Futurity in English, Future tense aspects, More on future tense, Using will and shall

Chapter 8. Adjectives

Definition, Types of Adjectives, As Attributive and Predicative, Degrees, Adjectives Table 1,Adjectives Table 2,Adjectives Table 3, Comparative form with To, Comparative into Positive, Superlative into Positive, Adjectives from Noun and verb, Conversation 1, Conversation 2, Special Adjectives, Examples

Chapter 9. Adverbs

Introduction, Kinds of adverbs, Examples

Chapter 10. Subject, Predicate and Object

Introduction, Subject, Predicate and Object, What is an object?, Examples of objects, Examples of predicates, Examples of subject

Chapter 11.Prepositions

Introduction, Objects of preposition 1, Objects of preposition 2, Prepositions with adjectives, Prepositions with forms of transport, Place and direction, Place and time, Examples

Chapter 12. Conjunctions

Conjunctions, Although, As, Because, Despite, In spite of, But, Neither-nor, So, Unless, While, Yet

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