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teachinghistory.org

https://teachinghistory.org· First analyzed 07 May 2026· Updated 07 May 2026
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teachinghistory.org
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Hosting Provider

IP Address

129.174.134.63

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Fairfax, United States

ASN

AS11279

Organization

George Mason University

Nameservers

ns1.rrchnm.org.ns3.rrchnm.org.ns2.rrchnm.org.

Performance

90

Core Web Vitals

Weight

First Contentful Paint
1.5 s10%
Speed Index
1.9 s10%
Largest Contentful Paint
25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.4 MB
47 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Drupal

Technology Stack

3 Technologies Detected

CSS Frameworks

1

Analytics

1

Languages

1

SEO Analysis

D58/100
16
7
2
Meta Tags9/15
Content11/12
Headings3/8
Technical16/25
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
T
teachinghistory.orgteachinghistory.org

Home | TeachingHistory.org

TeachingHistory.org is designed to help K–12 history teachers access resources and materials to improve U.S. history education in the classroom.

Title Length26 chars

Recommended: 50-60 chars (~155px / 580px)

Description Length144 chars

Recommended: 120-160 chars

Issues (2)

  • Missing H1 tag — every page should have exactly one H1
  • Most images missing alt text (11/20) — critical for accessibility and SEO

Crawlability

Sitemap
robots.txt

53 rules

Local SEO

Local Search Readiness

3/100
Poor
1 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

D44/100
Bot Access
20/25
Machine Read.
12/25
Schema Data
0/25
Citation
12/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
def. listsnavheader/footer
Text ratio:15%
Words:653
Token eff.:Optimal
Sections/1K:24.5
Depth:3/5

Structured Data

No Schema

Citation Readiness

Opening Summary25w
Descriptive Headingsavg 2.7w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (8)
AI readiness recommendation preview...

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
A
83/100
13
Passed
2
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
13/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
7/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
1 recommendation
  • Accessibility recommendation preview...

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
41/100
C
177 mg
CO₂e / view
1.4 MB
Page Weight
60%
Cleaner Than
New Visitor
203 mg
vs
Returning (cached)
101 mg
Annual (10K/mo)
21.3 kg
Emission Segments
Data Center
40 mg
Network
43 mg
Device
95 mg
Resource Breakdown
JavaScript
38.3 KB
Images
1.3 MB
CSS
68.2 KB
HTML
8.4 KB
Other
1.5 KB
Green Hosting Not Verified
George Mason University
4 recommendations
  • Carbon footprint recommendation preview...
D

Security Score

41%Poor
Interactive

HTTPS

No WAF

89d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

07.05.2026

Valid Until

05.08.2026

Subject Alternative Names (1)

teachinghistory.org

SHA-256 Fingerprint

18:ED:28:F5:E5:2B:12:5B:ED:56:0F:4B:3A:96:F0:FB:A2:06:16:9B...

Top Recommendations

Security recommendation preview

HTTP Headers

Developer Console

alt-svc
h3=":443"; ma=2592000
cache-control
🟡 12 Hours(max-age=43200, public)
content-encoding
zstd
content-language
en
content-type
text/html; charset=UTF-8
date
Thu, 07 May 2026 15:37:48 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

53

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

Domain Information

teachinghistory.org

Domain Age
23y 3m

Created

27.01.2003

Expires

27.01.2027

Last Updated

02.01.2026

Registrar

NameCheap, Inc.

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked
Data Protection Officer mentioned

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
C
62/100
Mobile Friendly1 breakpoint
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width, initial-scale=1.0
1 recommendation
  • Mobile compatibility recommendation preview...

Typography & Readability

Arial Narrow + Helvetica Neue

WCAG Partial
53/100
Readability
/30
18/30

11px · LH 1.50

Hierarchy
/20
8/20
WCAG
/25
13/25

1:1 min contrast

Performance
/25
14/25

System fonts

Heading Font

Arial Narrow

Sans

Body Font

Helvetica Neue

Sans11px

Contrast Ratio

1:1

26 issues

Reading Comfort

~74 CPL

Optimal (45–75)
18px
h2
15px
h3
11px
p

❌ Critical: 11px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~74 chars/line (ideal 45–75 CPL).

❌ Very complex text: Flesch score 28/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 26 elements below WCAG AA threshold (min 1.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

Color Palette

6 unique colors
Dark
#52594b
Text· 7%
#f1f1e7
Primary· 50.99999999999999%
#6b9482
Secondary· 21.2%
#8ea686
Secondary· 9.7%
#c4d3bb
Secondary· 9.3%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

8 Resources

4
Scripts
4
Styles
1
Async
1
Defer

Top Script Sources

local(2)stats.rrchnm.org(1)rrchnm.org(1)

Website Identity

teachinghistory.org

23 years old
Location detected: 🇺🇸 United Statesvia ip
NameCheap, Inc.en

Social Profiles

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Last analyzed: 07 May 2026 at 22:34

Historical Analysis & Change Tracking