#class-3

வகுப்பு 3 | சமூக அறிவியல் | அலகு 2 | சரணாலயங்கள் | பகுதி 1

வகுப்பு 3 | சமூக அறிவியல் | அலகு 2 | சரணாலயங்கள் | பகுதி 1

KalviTv Schedules Class 1 – 8 in Friday 18.11.2021

வகுப்புகள்பாடம்அலகுபாடத்தலைப்புகள்வகுப்பு- 1பேசும் ஓவியம்கதைஅலட்சியத்தை தவிர்ப்போம் &சத்தியத்தை மீறக் கூடாதுவகுப்பு – 2பேசும் ஓவியம்கதைகுணத்தால் மட்டுமே மதிப்பீடுவகுப்பு – 3சமூக அறிவியல்2சரணாலயங்கள் – பகுதி – 1வகுப்பு – 4சமூக அறிவியல்2தமிழ்நாட்டில் இயற்கை அமைப்பு – பகுதி – 4வகுப்பு – 5சமூக அறிவியல்3உலகில் உள்ள கண்டங்கள் – பகுதி – 2வகுப்பு – 6சமூக அறிவியல்3குடி தலைமையிலிருந்து பேரரசு வரைவகுப்பு –…

NCERT Question Paper for Class 3, NCERT 3rd Class Model Paper 2022 Pdf Download JnanabhumiAP

NCERT Question Paper for Class 3 Download to All Languages & Subjects of the Course. NCERT 2rd Class Model Paper 2022 Pdf download with Sample Paper for Hindi, English, Mathematics, General Awareness, Environmental Science (EVS), and others at https://ift.tt/2YGVlHC and https://ncert.nic.in…

Those 3rd Standard students who are studying in Central Board Schools can download the NCERT Grade 3 Question Paper 2022 to learn at home. Both Government & Private School Teaching Staff has provided the practice questions with learning material to each student of the school. Get the study material for all English medium, Hindi medium, and Urdu medium students to improve knowledge of the course.

NCERT Question Paper for Class 3

Teaching Staff of the school can provide the NCERT Class 3 Question Paper 2022 for

KVS 3rd Class Textbook 2021-2022 Download (eBook/Pdf Book) *All Subject JnanabhumiAP

KVS 3rd Class Books 2021 Download for Kendriya Vidyalaya Class 3 Textbooks 2021 with Study & Learning Material for Mother Language, Mathematics, English, General Awareness, Environmental Science (EVS), Health & Physical Education, General Knowledge (GK), Art & Craft, Hindi, Computer Education and etc, Download KVS Class 3 Books 2021 for Hand Books, Workbook, Teacher’s Manual Download at https://ift.tt/31Z5VJu;

The Kendriya Vidyalaya Sangathan (KVS) has announced the Elementary Education, Primary School Textbooks with Workbooks along with all practice and learning material for Class 3 / STD-3 Student located at all regional schools working under the board, as per the reports announced the board main portal there are 1235 schools are functioning at all regions in the Country.

Government of India, Ministry of Human Resource Development,(MHRD) has distributed KVS 3rd Class Books 2021 with all other Study material to all eligible student under free textbooks scheme, the KV Sangathan is an autonomous body affiliated with CBSE will be distributing the Learning Material for Hand Books, WorkBook, Teacher’s Manual in before commitment of the class to all regional student in subject wise for National and Regional languages as per their syllabus.

KVS 3rd Class Textbooks 2021 Subject wide Names and Codes (*All Subjects)

There are a list of Textbooks Names with Subject Codes are published at the main and regional portals of Kendriya Vidyalaya Sangathan, every English medium, Hindi medium, Urdu medium student can check the book’s details to all regions in subject wise, here we have also shared the KVS 3rd Class Books 2021 with Names & Subject Codes along with Notebooks details.

SUBJECT TEXT BOOKS (NCERT) NOTE BOOKS (CROWN SIZE-100 PAGES) English Marigold-3 Four Ruled – 4 Hindi Rimjhim-3 Double Ruled -4 Maths Math Magic-3 Square / Check Ruled -4 EVS Looking Around-3 Four Ruled –1, Double Ruled -3 Drawing – Plain Drawing Notebook – 1 Music – Long & Single Ruled -4

KVS 3rd Class Textbooks 2021 with Notebooks

We have advised to everyone can contact your responsible Vidyalaya Principal to get complete books information with study material especially for your child to Class III level elementary education.

KVS 3rd Class Books 2021-2022 Download for eBook / Pdf Book / Flipbook *All Subject

The Kendriya Vidyalaya Sangathan has provided the direct link to download KVS STD-3 Books 2021 for Textbooks, Notebooks, Workbooks, Handbook, flipbook for all regional students of the board, here we have shared simple steps to download just follow…

Visit KV Sangathan official website at https://ift.tt/2EmeBB8

Now Select Publication option located at the main menu of the portal

Choose textbooks option from the main menu and proceed

Now you have reached the main page of KVS Textbooks 2021 Download

Select your course like STD-3 and choose a subject name and select book name from the list

Proceed with a download link with selecting the format of the book like Pdf/eBook/flipbook and etc

That’s it, now you have successfully downloaded all subject textbooks in electronic mode digital format (eBooks / Pdf Books), copy into any supported device to study as digitally or make print / Xerox to bind a book.

Follow the direct links to download KVS Class-III Textbooks 2021 to all regional students of the board

KVS 3rd Class English Medium Books 2021-2022 (All Regions) Curriculum Pdf Download

Looking Around (EVS)

Marigold

Mathematics

KVS 3rd Class Hindi Medium Books & Curriculum 2020 (All Regions)

Aas-Paas

Ganit ka Jadu

Rimjhim

KVS 3rd Class Urdu Medium Books & Curriculum 2020 for (All Regions)

Aas Pass (Urdu)

Ibtedai Urdu

Riyazi ka Jadu

KVS 3rd Class English Marigold Books 2021-2022 (Marigold)

Unit 1: 1. Good Morning

Unit 1: 2. The Magic Garden

Unit 2: 1. Bird Talk

Unit 2: 2. Nina and the Baby Sparrows

Unit 3: 1. Little by Little

Unit 3: 2. The Enormous Turnip

Unit 4: 1. Sea Song

Unit 4: 2. A Little Fish Story

Unit 5: 1. The Balloon Man

Unit 5: 2. The Yellow Butterfly

Unit 6: 1. Trains

Unit 6: 2. The Story of the Road

Unit 7: 1. Puppy and I

Unit 7: 2. Little Tiger, Big Tiger

Unit 8: 1. What’s in the Mailbox?

Unit 8: 2. My Silly Sister

Unit 9: 1. Don’t Tell

Unit 9: 2. He is My Brother

Unit 10: 1. How Creatures Move

Unit 10: 2. The Ship of the Desert

KVS Books for Class 3 (STD-3 हिंदी मध्यम)

पाठ 1: कक्कू

पाठ 2: शेखीबाज़ मक्खी

पाठ 3: चाँद वाली अम्मा

पाठ 4: मन करता है

पाठ 5: बहादुर बित्तो

पाठ 6: हमसे सब कहते

पाठ 7: टिपतिपवा

पाठ 8: बंदर बाँट

पाठ 9: अक्ल बड़ी या भैंस

पाठ 10: क्योंजीमल और कैसे कैसलिया

पाठ 11: मीरा बहन और बाघ

पाठ 12: जब मुझे साँप ने काटा

पाठ 13: मिर्च का मजा

पाठ 14: सबसे अच्छा पेड़

पाठ 15: पेड़ पत्ते ही पत्ते

KVS 3rd Class Maths Books 2021 (Maths Magic English Medium)

Chapter 1: Where to Look From

Chapter 2: Fun with Numbers

Chapter 3: Give and Take

Chapter 4: Long and Short

Chapter 5: Shapes and Designs

Chapter 6: Fun with Give and Take

Chapter 7: Time Goes On…

Chapter 8: Who is Heavier?

Chapter 9: How Many Times?

Chapter 10: Play with Patterns

Chapter 11: Jugs and Mugs

Chapter 12: Can we Share?

Chapter 13: Smart Charts!

Chapter 14: Rupees and Paise

KVS 3rd Class Maths हिंदी मध्यम Books 2021 (गणित का जादू)

अध्याय 1: देखें किधर से

अध्याय 2: संख्याओं की उछल कूद

अध्याय 3: कुछ लेना कुछ देना

अध्याय 4: क्या लंबा क्या छोटा

अध्याय 5: आकृतिओं का कमाल

अध्याय 6: लेन देन का खेल

अध्याय 7: समय समय की बात

अध्याय 8: कौन किससे भारी?

अध्याय 9: बोलो भाई कितने गुना?

अध्याय 10: पैटर्न की पहचान

अध्याय 11: जग मग, जग मग

अध्याय 12: कैसे-कैसे बाँटे?

अध्याय 13: स्मार्ट चार्ट!

अध्याय 14: रुपए और पैसे

KVS 3rd Class EVS Books 2021 (Looking Around)

Chapter 1. Poonam’s Day out

Chapter 2. The Plant Fairy

Chapter 3. Water O’ Water!

Chapter 4. Our First School

Chapter 5. Chhotu’s House

Chapter 6. Foods We Eat

Chapter 7. Saying without Speaking

Chapter 8. Flying High

Chapter 9. It’s Raining

Chapter 10. What is Cooking

Chapter 11. From Here to There

Chapter 12. Work We Do

Chapter 13. Sharing Our Feelings

Chapter 14. The Story of Food

Chapter 15. Making Pots

Chapter 16. Games We Play

Chapter 17. Here comes a Letter

Chapter 18. A House Like This

Chapter 19. Our Friends – Animals

Chapter 20. Drop by Drop

Chapter 21. Families can be Different

Chapter 22. Left-Right

Chapter 23. A Beautiful Cloth

Chapter 24. Web of Life

KVS 3rd Class EVS Books 2021 for हिंदी मध्यम (आस-पास)

पाठ 1: डाल-डाल पर, ताल-ताल पर

पाठ 2: पौधों की परी

पाठ 3: पानी रे पानी

पाठ 4: हमारा पहला स्कूल

पाठ 5: छोटू का घर

पाठ 6: खाना अपना-अपना

पाठ 7: बिन बोले बात

पाठ 8: पंख फैलाएँ, उड़ते जाएँ

पाठ 9: बादल आए, बारिश लाए

पाठ 10: पकाएँ, खाएँ

पाठ 11: यहाँ से वहाँ

पाठ 12: काम अपने-अपने

पाठ 13: छूकर देखें

पाठ 14: कहाँ से आया, किसने पकाया

पाठ 15: आओ बनाएँ बर्तन

पाठ 16: खेल-खेल में

पाठ 17: चिट्ठी आई है

पाठ 18: ऐसे भी होते है घर

पाठ 19: हमारे साथी जानवर

पाठ 20: बूँद-बूँद से

पाठ 21: तरह-तरह के परिवार

पाठ 22: दायाँ-बायाँ

पाठ 23: कपड़ा सजा कैसे

पाठ 24: जीवन का जाल

CBSE 3rd Class Textbook 2021-2022 Download (eBook/Pdf Book) *All Subject JnanabhumiAP

CBSE 3rd Class Books 2021 Download for Subject wise latest Textbooks, Workbooks, and Other learning material for Hindi Medium, English Medium Student Hindi, English, Urdu, Sanskrit, Mathematics, General Awareness, Environmental Science (EVS), Health & Physical Education, General Knowledge (GK), Art & Craft Subjects as eBooks or Pdf Books online at https://cbse.nic.in…

Government of India, Central Board of Secondary Education has published the Elementary Education Primary School Study material, Learning material with Subject wise latest Textbooks in Electronic mode Digital format of eBook and Pdf Books for all regional student of Delhi Scheme, All India Scheme, Chennai Scheme Hindi medium, English medium and another regional language student of the Country.

Every the CBSE Board will distribute latest books to all eligible students under Free Textbooks scheme, and this year also distributed CBSE 3rd Class Books 2021 to all eligible student of Government & Private School of the board, the board will provide all latest Textbooks, Worksheets, Flipbooks, Handbooks, Learning & Study material in before commitment of Class.

CBSE 3rd Class Books 2021

About CBSE STD-III Books 2021 Details Name of the Education Board Central Board of Secondary Education (CBSE) Name of the Class Class-3 / 3rd Class / STD-III Study Material for Text Books, Hand Books, WorkBook, Teacher’s Manual  Type of Books Pdf Books, eBooks, Digital Format Textbooks Official Website of the Board http://cbse.nic.in

Categories CBSE, Class-3, Textbooks,

CBSE Board 3rd Class Books 2021

CBSE Board 3rd Class Books 2021 Name & Subject Code’s for STD-3

The CBSE Board has announced and provided the Primary School Class-3 / STD-3 Books in all regional languages for Hindi, Urdu, Sanskrit, Mathematics, English, General Awareness, Environmental Science (EVS), Health & Physical Education, General Knowledge (GK), Art & Craft and other subjects.

The Name & Subject code of CBSE STD-3 Books 2021 – 2022 is published at their official main and regional portals of the board, here we have also shared the subject wise textbooks name with code to get study material.

Subject Code Name of the Book ECW My Handwriting Part 3 SC New Science in everyday life Comp Browser Math New Enjoying Mathematics SST Community, A Text Book of Social Studies GK Focus on General Knowledge HVY RachnaPrasoon Eng New Oxford Modern English Course Book III Egrm New Learners Grammar and Composition Draw Creative Art Book (3) HWR Sarovar Hindi Sulekh MSC Inspiration for Life Hindi Hindi Saritha ECon Edutainment Communicate and Learn

CBSE 3rd Class Books 2021

Notebook Details

Type of Book Name of Book Four line copy English I, English II, GK, Science, Social studies, MSC, Computer (200 pg 7) Two line copy Hindi I, Hindi II (200 pg 2) Box copy Maths (200 pg 1)

CBSE 3rd Class Notebooks 2021

Test Copies

Four line Copy (100 pg 7)

Two Line copy (100 pg 2)

Box copy (100 pg 1)

Covering Paper Pink

CBSE 3rd Class Books 2021-2022 Download for eBook / Pdf Books / Flipbook (*All Subject)

The CBSE Board has published its Examination Material with all subject Textbooks and Study / Learning material along with 3rd Class books at their official website student corner.

Here we have also shared CBSE Board Class 3 Books 2021 Download process for Pdf Books, E-Books, Flipbooks, Handbooks in Electronic mode Digital format from the following simple steps…

Visit the CBSE Board official website and select Student Corner portal at https://ift.tt/2TVnPMR

Select the option about Publications or eCBSE link option located for Collection of CBSE Books in Electronic Format

Now Choose the Class I to V option, then a list of books are displayed on the screen in subject wise included Class 2

Now Select Name of the Book and proceed, then the CBSE STD-3 eBook 2021 is downloaded as Pdf file format or Digital format eBook.

Copy into any supported device or make printable copies to bind a book, we have suggested to every student and their parent can follow the direct links to download CBSE 3rd Class Books 2021 in subject wise for all regional students.

CBSE Board Student Corner Portal

CBSE Board Publications Portal

CBSE eBook Download 

CBSE 3rd Class Books 2021 (All Regions) English Medium Curriculum Pdf Download

Looking Around (EVS)

Marigold

Mathematics

CBSE 3rd Class Books 2021-2022 (All Regions) Hindi Medium Curriculum Pdf Download

Aas-Paas

Ganit ka Jadu

Rimjhim

CBSE 3rd Class Books 2021 (All Regions) Urdu Medium Curriculum Pdf Download

Aas Pass (Urdu)

Ibtedai Urdu

Riyazi ka Jadu

Tripura 1st, 2nd, 3rd, 4th, 5th Class Textbook 2021, TBSE 1st, 2nd, 3rd, 4th, 5th Class E-Textbook 2021 Pdf Download JnanabhumiAP

SCERT Tripura 1st, 2nd, 3rd, 4th, 5th Class Textbook 2021 Pdf Download for TBSE Primary School E-Book 2021 and Study & Learning Material for Hindi Medium, English Medium, Bengali Medium, Urdu Medium student at https://ift.tt/35QriC7;

Government of Tripura, Directorate of School Education has introduced the State Elementary Education Primary School Textbooks in subject wide for both Bengali medium, English medium and other medium student of Class 1st, 2nd, 3rd, 4th, 5th standard to the academic year of 2021.

The Education Department has provided those primary level Textbook, Study & Learning Material, Handbooks, Teacher Manuals, Flipbooks, and other learning material designed and published by the State Council of Educational Research & Training (SCERT) subject experts.

This year also conducted the Tripura Board 1st, 2nd, 3rd, 4th, 5th Class Textbook 2021 distribution to all eligible students of Government & Private school before the commitment of the class by Sarva Shiksha Abhiyan (SSA) those direct download links also shared below by Jnanabhumiap.in.

Tripura Board 1st, 2nd, 3rd, 4th, 5th Class Textbook 2021

TBSE E-Textbook 2021 Tripura Board Primary School E-Textbook 2021 Name of the Board Tripura State Board of Secondary Education (TBSE) Directorate of School Education, Govt. of Tripura Name of the Class Elementary Education Primary School Class 1, 2, 3, 4, 5 Medium Bengali, Hindi, English, Urdu and etc, Official Website https://ift.tt/3fineOd & https://ift.tt/2u0RE46 Categories Class-1, Class-2, Class-3, Class-4, Class-5, Primary School, Textbooks, Tripura Course Primary Level

Tripura Board 1st, 2nd, 3rd, 4th, 5th Class E- Textbooks 2021

Tripura 1st, 2nd, 3rd, 4th, 5th Class Textbook 2021

Every year the School Education Department has distributed the Primary School subject-wise latest textbooks along with the new edition of study material to all eligible students of the board under the free textbook scheme by Sarva Shiksha Abhiyan (SSA).

Every Elementary School Primary Level 1st to 5th Standard student can get your allotted subject wide textbooks from the responsible headmaster (Pradhan Adhyapak), they will issue to each individual candidate in before commitment of the class in every year.

The BEO (Block Education Officer) & BSA (Basic Shiksha Adhikari) has monitored the distribution of  textbooks, teachers handbooks, workbooks, Flip Books, and other Study & Learning material and updated to the higher authorities of the board.

Tripura Board 1st, 2nd, 3rd, 4th, 5th Class Textbook 2021 Pdf Download (E-Book & Pdf Book)

We advised contacting your studying government or private school authorities to get your allotted Textbooks under the free textbook scheme, and the candidate who has interested to download online can download the state SCERT portal.

The School Education Department has provided the digital content of Tripura Class 1st, 2nd, 3rd, 4t, 5th eTextbook 2021 Pdf in chapter wide for each chapter of the course as E-Book, E-Recourses for all subject study material in digital format of EPUB & Pdf book format.

Here we have provided simple steps along with the direct download link of SCERT Tripura Primary School eTextbook 2021 for all medium student to the subjects of Bengali, Hindi, English, Sanskrit, Urdu, Mathematics, General Science, Social Science, Sanskrit, Environmental Studies (EVS), and others.

Visit the State Council of Educational Research & Training (SCERT) or Education Board official website at https://ift.tt/3fineOd or https://ift.tt/2u0RE46

Now Search the link of E-Books, and proceed

Now you have seen a list of links with chapter wide download links

Proceed with the links to download Class 1, 2, 3, 4, 5 Ebooks or other class

Follow the direct links to download TBSE 1st, 2nd, 3rd, 4th, 5th eBooks 2021 for Elementary Education Primary School student by SCERT.

SCERT E-BOOKS 2021

TBSE E-Textbooks 2021

Tripura 1st Class Textbook 2021 Download

English Download Bengali Download Math Download

Tripura 1st Class Textbook 2021

Tripura 2nd Class Textbook 2021 Download

English Download Bengali Download Math Download

Tripura Board 2nd Class Textbook 2021

Tripura 3rd Class Textbook 2021 Download

English Download Bengali Download Math Download Science & EVS Download SST Download

Tripura Board 3rd Class Textbook 2021

Tripura 4th Class Textbook 2021 Download

English Download Bengali Download Math Download Science Download SST Download

Tripura 4th Class Textbook 2021

Tripura 5th Class Textbook 2021 Download

English Download Bengali Download Math Download Paribesh Bigyan Download SST Download

Tripura Board 5th Class Textbook 2021

Tripura 1st, 2nd, 3rd, 4th, 5th Class Textbook 2021, TBSE 1st, 2nd, 3rd, 4th, 5th Class E-Textbook 2021 Pdf Download JnanabhumiAP

SCERT Tripura 1st, 2nd, 3rd, 4th, 5th Class Textbook 2021 Pdf Download for TBSE Primary School E-Book 2021 and Study & Learning Material for Hindi Medium, English Medium, Bengali Medium, Urdu Medium student at https://ift.tt/35QriC7;

Government of Tripura, Directorate of School Education has introduced the State Elementary Education Primary School Textbooks in subject wide for both Bengali medium, English medium and other medium student of Class 1st, 2nd, 3rd, 4th, 5th standard to the academic year of 2021.

The Education Department has provided those primary level Textbook, Study & Learning Material, Handbooks, Teacher Manuals, Flipbooks, and other learning material designed and published by the State Council of Educational Research & Training (SCERT) subject experts.

This year also conducted the Tripura Board 1st, 2nd, 3rd, 4th, 5th Class Textbook 2021 distribution to all eligible students of Government & Private school before the commitment of the class by Sarva Shiksha Abhiyan (SSA) those direct download links also shared below by Jnanabhumiap.in.

Tripura Board 1st, 2nd, 3rd, 4th, 5th Class Textbook 2021

TBSE E-Textbook 2021 Tripura Board Primary School E-Textbook 2021 Name of the Board Tripura State Board of Secondary Education (TBSE) Directorate of School Education, Govt. of Tripura Name of the Class Elementary Education Primary School Class 1, 2, 3, 4, 5 Medium Bengali, Hindi, English, Urdu and etc, Official Website https://ift.tt/3fineOd & https://ift.tt/2u0RE46 Categories Class-1, Class-2, Class-3, Class-4, Class-5, Primary School, Textbooks, Tripura Course Primary Level

Tripura Board 1st, 2nd, 3rd, 4th, 5th Class E- Textbooks 2021

Tripura 1st, 2nd, 3rd, 4th, 5th Class Textbook 2021

Every year the School Education Department has distributed the Primary School subject-wise latest textbooks along with the new edition of study material to all eligible students of the board under the free textbook scheme by Sarva Shiksha Abhiyan (SSA).

Every Elementary School Primary Level 1st to 5th Standard student can get your allotted subject wide textbooks from the responsible headmaster (Pradhan Adhyapak), they will issue to each individual candidate in before commitment of the class in every year.

The BEO (Block Education Officer) & BSA (Basic Shiksha Adhikari) has monitored the distribution of  textbooks, teachers handbooks, workbooks, Flip Books, and other Study & Learning material and updated to the higher authorities of the board.

Tripura Board 1st, 2nd, 3rd, 4th, 5th Class Textbook 2021 Pdf Download (E-Book & Pdf Book)

We advised contacting your studying government or private school authorities to get your allotted Textbooks under the free textbook scheme, and the candidate who has interested to download online can download the state SCERT portal.

The School Education Department has provided the digital content of Tripura Class 1st, 2nd, 3rd, 4t, 5th eTextbook 2021 Pdf in chapter wide for each chapter of the course as E-Book, E-Recourses for all subject study material in digital format of EPUB & Pdf book format.

Here we have provided simple steps along with the direct download link of SCERT Tripura Primary School eTextbook 2021 for all medium student to the subjects of Bengali, Hindi, English, Sanskrit, Urdu, Mathematics, General Science, Social Science, Sanskrit, Environmental Studies (EVS), and others.

Visit the State Council of Educational Research & Training (SCERT) or Education Board official website at https://ift.tt/3fineOd or https://ift.tt/2u0RE46

Now Search the link of E-Books, and proceed

Now you have seen a list of links with chapter wide download links

Proceed with the links to download Class 1, 2, 3, 4, 5 Ebooks or other class

Follow the direct links to download TBSE 1st, 2nd, 3rd, 4th, 5th eBooks 2021 for Elementary Education Primary School student by SCERT.

SCERT E-BOOKS 2021

TBSE E-Textbooks 2021

Tripura 1st Class Textbook 2021 Download

English Download Bengali Download Math Download

Tripura 1st Class Textbook 2021

Tripura 2nd Class Textbook 2021 Download

English Download Bengali Download Math Download

Tripura Board 2nd Class Textbook 2021

Tripura 3rd Class Textbook 2021 Download

English Download Bengali Download Math Download Science & EVS Download SST Download

Tripura Board 3rd Class Textbook 2021

Tripura 4th Class Textbook 2021 Download

English Download Bengali Download Math Download Science Download SST Download

Tripura 4th Class Textbook 2021

Tripura 5th Class Textbook 2021 Download

English Download Bengali Download Math Download Paribesh Bigyan Download SST Download

Tripura Board 5th Class Textbook 2021