SentinelA new way to search

Search VoicesBlog

Sign In Sign Up

Sentinel keeps the record.

A permanent, searchable index of what is said in the video content shaping public conversation — built to support discovery and accountability across the voices that drive it.

Submit a Voice Request

Platform

Search
Browse Voices
Voices
Drive Again
Coverage
Custom Feed
Video Check
Statistics

Resources

Blog
Help
FAQ
Voice Request
Changelog
Sitemap

Company

About
Features
Pricing
Contact

Legal

Terms of Service
Privacy Policy
Acceptable Use
Cookies
Refund Policy
DMCA Policy

No content is hosted on Sentinel. All video content is delivered via YouTube embedded players in accordance with the YouTube Terms of Service. Sentinel is an organization and analytics platform that provides research tools to promote discovery and accountability across the video content shaping public conversation. Views, credit, subscriptions, and engagement remain with the original channels.

© 2026 SentinelSearch. All rights reserved.

Indexing what Voices say, when they say it.

Leigh Bortins · Sentinel

Leigh Bortins

Leigh Bortins

@leighbortins•5.7K subscribers•470 videos

Watch on YouTube Visit Website

About Leigh Bortins

Home Life with Leigh Bookclubs Speaking Requests Partners Leigh in the Media…

Watch

YouTube Official Website

Listen

Apple Podcasts RSS Feed

Follow

X (Twitter)Facebook Instagram

470

Videos

5.7K

Subscribers

294.7K

Total Views

Jul 8, 2007

Joined YouTube

Leigh Bortins Episode Catalog

Explore every episode. Find what matters.

The Math Map | 2026-2027 Book Club | Week 5: Multiplication

6410

The Math Map | 2026-2027 Book Club | Week 4: Addition and Subtraction

33540

Common Latin Book Club | Episode 9: First Declension Nouns

4220

The Math Map | 2026-2027 Book Club | Week 3: Comparison

600

Common Latin Book Club | Episode 8: Sum, Esse

1700

Common Latin Book Club | Episode 7: Parse and Translate

1200

The Math Map | 2026-2027 Book Club | Week 2: Number Notation

3700

The Math Map | 2026-2027 Book Club | Week 1: Ex Nihilo

16250

The Math Map | Summer Book Club 2026 | Week 15: Multiplying and Dividing Fractions

3120

Common Latin Book Club | Episode 6: Study Syntax

2900

The Math Map | Summer Book Club 2026 | Week 14: Adding and Subtracting Fractions

1400

Common Latin Book Club | Episode 5: Practice Forms

3700

Common Latin Book Club | Episode 4: Memorize Vocabulary

3410

Common Latin Book Club | Episode 3: Recite the Catechism

6700

The Math Map | Summer Book Club 2026 | Week 13: Simplifying Fractions

1300

Bob McEwen Recognizes Classical Conversations | Council for National Policy 2023

1400

The Math Map | Summer Book Club 2026 | Week 12: Division using Fractions

1200

The Math Map | Summer Book Club 2026 | Week 11: Factorization

3500

The Math Map | Summer Book Club 2026 | Week 10: Division

1100

Sing Choirs of New Jerusalem

1130

Common Latin Book Club | Episode 2: Reading the Vulgate

5950

The Math Map | Multiplying in Different Forms - 2026 Summer

2600

Common Latin Book Club | Episode 1: Introduction

139110

The Math Map | Multiplying with Place Value & the Distributive Law - 2026 Summer

5210

250 Years of America: New Mexico CC Challenge Students Honor the Nation

210

250 Years of America: Colorado CC Challenge Students Honor the Nation

710

250 Years of America: Arizona CC Challenge Students Honor the Nation

300

250 Years of America: Idaho CC Challenge Students Honor the Nation

700

250 Years of America: Nevada CC Challenge Students Honor the Nation

900

250 Years of America: Montana CC Challenge Students Honor the Nation

1200

The Math Map | Subtracting with Place Value - 2026 Summer

5410

The Math Map | Adding with Place Value - 2026 Summer

5000

250 Years of America: South Carolina, Georgia & Alabama CC Challenge Students Honor the Nation

3300

250 Years of America: Georgia & Alabama CC Challenge Students Honor the Nation

900

250 Years of America: Alabama CC Challenge Students Honor the Nation

1000

America Reads the Bible 250th Birthday

3320

The Math Map | Counting in Base N - 2026 Summer

27920

The Math Map | Counting with Place Value - 2026 Summer

10720

The Math Map | Counting Units - 2026 Summer

19831

The Math Map | Measured or Exact? - 2026 Summer

23720

250 Years of America: Tennessee CC Challenge Students Honor the Nation

5710

250 Years of America: Tennessee CC Challenge Students Honor the Nation

3400

The Math Map | What Is a Unit? - 2026 Summer

32671

The Question - Chapter Six. Math (Audiobook)

3600

The Question - Chapter Seven. Geography and Current Events (Audiobook)

1900

The Question - Chapter Eleven. Fine Arts (Audiobook)

1100

The Question - Epilogue. Rhetorical Thoughts On The Process Of Writing A Book (Audiobook)

1000

The Question - Appendix One. Model Questions (Audiobook)

700

The Question - Closing Credits (Audiobook)

400

The Question - Part Three. Appendices (Audiobook)

500

The Question - Chapter Ten. Science (Audiobook)

1000

The Question - Chapter Nine. History (Audiobook)

1800

The Question - Chapter Eight. Logic (Audiobook)

1000

The Question - Chapter Three. Frequently Asked Questions (Audiobook)

6910

The Question - Chapter Five. Writing (Audiobook)

4000

The Question - Chapter Four. Reading (Audiobook)

4620

The Question - Chapter Two. How the Dialectic Teaches Families to Wrestle (Audiobook)

11710

The Question - Part Two. The Dialectical Arts (Audiobook)

2400

The Question - Chapter One. Why We Still Need Classical Education (Audiobook)

25460

The Question - Introduction (Audiobook)

7020

The Question - Preface (Audiobook)

5610

The Question - Foreword (Audiobook)

3300

The Question - Part One. The Classical Model (Audiobook)

5410

The Question - Opening Credits (Audiobook)

10300

The Question - Acknowledgments (Audiobook)

5400

The Math Map | Lesson 30: Reflection

31641

The Math Map | Lesson 29: Seeing the Unseen

22321

The Math Map | Lesson 28: Proofs

30530

The Math Map | Lesson 27: Complex Numbers

24040

250 Years of America: Mississippi CC Challenge Students Honor the Nation

7420

250 Years of America: Louisiana & Oklahoma CC Challenge Students Honor the Nation

7710

250 Years of America: Great Lakes Region CC Challenge Students Honor the Nation

8110

250 Years of America: Great Lakes Region CC Challenge Students Honor the Nation

5200

The Math Map | Lesson 26: Accumulated Change

37631

The Math Map | Lesson 25: Rate of Change

32441

The Math Map | Lesson 24: Rates

33121

The Math Map | Lesson 23: Matrices

27441

The Math Map | Lesson 22: Populations

22110

250 Years of America: Missouri, Minnesota, & Wisconsin CC Challenge Students Honor the Nation

18253

250 Years of America: Wisconsin CC Challenge Students Honor the Nation

8200

250 Years of America: Kansas, Iowa, & Wisconsin CC Challenge Students Honor the Nation

7420

250 Years of America: CC Challenge Students Honor the Nation | Kansas & Minnesota

14130

The Math Map | Lesson 21: Locations

35120

The Math Map | Lesson 19: Open Shapes

30310

The Math Map | Lesson 20: Closed Shapes

25940

A Classical Conversation with Os Guinness

19941

The Math Map | Lesson 18: Transformations

57450

A Classical Conversation with CC Venezuelans

2.2K7315

The Math Map | Frequently Asked Questions - 3

23430

The Math Map | Frequently Asked Questions - 2

18220

The Math Map | Frequently Asked Questions - 1

20920

The Math Map | Lesson 17: Intersected Shapes

48640

The Math Map | Lesson 16: Triangles in Circles

44561

The Math Map | Lesson 15: Assessment - 2025 Edition

39530

The Math Map | Lesson 14: Constructions

46840

The Math Map | Lesson 13: Circles & Ellipses

35650

The Math Map | Lesson 12: Polygons

31442

The Math Map | Lesson 11: Curved Lines

51850

The Math Map | Lesson 10: Intersected Lines

53220

The Math Map | Lesson 9: Straight Lines

59630

The Math Map | Lesson 8: Equations

81661

The Math Map | Lesson 7: Exponentiation

800112

The Math Map | Lesson 6: Division

89262

The Math Map | Lesson 5: Multiplication

1K71

The Math Map | Lesson 4: Addition & Subtraction – 2025 edition – TMM at Home

1.2K54

The Math Map | Lesson 3: Comparison – 2025 edition – TMM at Home

1.7K135

The Math Map | Lesson 2: Number Notation – 2025 edition - TMM at Home

3.7K2912

Toward the Quadrivium CC Conference 2011 | Charles Carpenter, The College Considerations

8540

Toward the Quadrivium CC Conference 2011 | Nancy Pearcey, The Soul of Science

5220

Toward the Quadrivium CC Conference 2011 | Charles Carpenter, SAT Preparation

5500

Toward the Quadrivium CC Conference 2011| Leigh Bortins, Homeschooled Graduates Interview

2810

Toward the Quadrivium CC Conference 2011 | Nancy Pearcey, How Evangelicals Lost Their Minds

8720

Toward the Quadrivium CC Conference 2011 | Leigh Bortins, Beginning the Conversation

4600

Toward the Quadrivium CC Conference 2011 | Nancy Pearcey, Teaching Worldview Across Curriculum

9110

The Math Map | Lesson 1: Ex Nihilo – 2025 edition - TMM at Home

7.9K899

The Math Map | Summer Book Club 15: Create Your Own Game & Spirograph

55220

The Math Map | Summer Book Club 14: Race to the Origin & Checkers

24800

The Math Map | Summer Book Club 13: Slopes & Area Under the Curve

17610

The Math Map | Summer Book Club 12: Time Zones & Stoichiometry

25601

The Math Map | Summer Book Club 11: Basic Origami and Score!

26710

The Math Map | Summer Book Club 10: Points, Lines, and Planes & Globe

20400

Markers & Milestones | Ryan Smith, New Aberdeen College

20240

The Math Map | Summer Book Club 9: Tangrams & Transformations

27730

The Math Map | Summer Book Club 8: Board Games & Unit Circle Parchisi

33931

The Math Map | Summer Book Club 7: Celtic Chess and Ruler & Compass

32640

The Math Map | Summer Book Club | The Math Map Companion

89081

The Math Map | Summer Book Club 6: Roundabouts & Dot Paper

30331

The Math Map | Summer Book Club 5 Battleship & Missing Angles

36442

The Math Map | Summer Book Club 4 - Fox & Geese, Manipulatives & Tools

44630

The Math Map | Summer Book Club 3 Multiplication Chart & Fractions

46840

The Math Map | Summer Book Club 2 – Games | Justice & Hundred Number Chart

67520

The Math Map | Summer Book Club 1 – Games (Number Knockout & Place Value)

2.8K282

The Math Map | Lesson 30 Reflection

54340

The Math Map | Lesson 29 Seeing the Unseen

1.5K81

The Math Map | Lesson 28 Proofs

1.2K61

Words Aptly Spoken | Iliad

28510

The Math Map | Lesson 27 Complex Numbers

1.4K85

Words Aptly Spoken | The Discoverers

20110

The Math Map | Lesson 26 Accumulated Change

1.5K141

Words Aptly Spoken | Where the Red Fern Grows

13700

The Math Map | Lesson 25 Rate of Change

1.4K86

The Math Map | Lesson 24 Rates

1.4K143

The Math Map | Lesson 23 Matrices

1.5K102

Words Aptly Spoken | The Lion, Witch, and Wardrobe

18910

The Math Map | Lesson 22 Populations

1.1K81

The Math Map | Lesson 21 Locations

1.4K94

Words Aptly Spoken | Emperors of Rome

15220

Words Aptly Spoken | Exploring the Oceans with Uncle Paul

22820

The Math Map | Lesson 20 Solid Shapes

1.4K122

The Math Map | Lesson 19 Open Shapes

1.5K124

Showing 1–150 of 489

1/4