scienceinschool.org

https://scienceinschool.org· First analyzed 07 May 2026· Updated 07 May 2026

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scienceinschool.org

Mobile

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Hosting Provider

CERN-LAN1

IP Address

137.138.226.190

Site Location

🇨🇭 Switzerlandvia ip

Server Location

🇨🇭 Geneva, Switzerland

ASN

AS513

Organization

CERN-LAN1

Server

OpenResty

Nameservers

ext-dns-1.cern.ch.ext-dns-2.cern.ch.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

540 ms10%

Speed Index

702 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

2 MB

43 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9.4

cms

VF-WP SISv1.0.0Custom

by Alexander Kubias

View Theme

Technology Stack

11 Technologies Detected

Plugins

Analytics

Libraries

CSS Frameworks

Web Servers

Languages

SEO Analysis

B79/100

Meta Tags11/15

Content11/12

Headings3/8

Technical25/25

E-E-A-T2/7

Images2/7

Links5/5

URL5/5

Social4/5

Freshness4/4

Mobile4/4

Indexability3/3

scienceinschool.orgscienceinschool.org

Homepage – scienceinschool.org

Science in School is a free online magazine that provides inspiring teaching resources covering all STEM subjects.

Title Length30 chars

Recommended: 50-60 chars (~180px / 580px)

Description Length114 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (21/38) — critical for accessibility and SEO

7 issues found

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Crawlability

Sitemap

Type: index

15 URLs

15 sub-sitemaps

robots.txt

62 rules

Local SEO

Local Search Readiness

23/100

Needs Work

6 11

Sponsored

AI & LLM Readiness

C60/100

Bot Access

20/25

Machine Read.

13/25

Schema Data

8/25

Citation

19/25

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

navheader/footer

Text ratio:4%

Words:578

Token eff.:Optimal

Sections/1K:31.1

Depth:2/5

Structured Data

4 JSON-LD

Organization×1.1WebSiteBreadcrumbListSearchAction

sameAs entity links

Citation Readiness

Opening Summary49w

Descriptive Headingsavg 4.6w

Canonical URL

Open Graph3/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (7)

AI readiness recommendation preview...

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Sponsored

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.

64/100

Passed

Critical

Warnings

Images & Alt Text

10/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

20/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

10/15

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

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

0/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 recommendations

•Accessibility recommendation preview...

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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.

35/100

248 mg

CO₂e / view

2.0 MB

Page Weight

50%

Cleaner Than

New Visitor

283 mg

Returning (cached)

142 mg

Annual (10K/mo)

29.7 kg

Emission Segments

Data Center

55 mg

Network

60 mg

Device

133 mg

Resource Breakdown

JavaScript

56.7 KB

Images

1.6 MB

CSS

284.2 KB

HTML

22.1 KB

Green Hosting Not Verified

CERN-LAN1

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

201d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

05.11.2025

Valid Until

24.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

www.cern.ch*.app.cern.ch*.apptest.cern.ch*.docs.cern.ch*.web.cern.ch*.webtest.cern.chabout.cernaccelerating-news.eu+12 more

SHA-256 Fingerprint

17:0D:6B:78:94:64:BC:C4:3F:F6:0F:D0:0C:82:5B:26:15:2E:11:60...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 3s(max-age=3, must-revalidate, private)

content-encoding

📦 Gzip(gzip)

content-length

22307

content-type

text/html; charset=UTF-8

date

Thu, 07 May 2026 02:44:39 GMT

last-modified

Wed, 06 May 2026 14:18:15 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

scienceinschool-org.mail.protection.outlook.com

Domain Information

scienceinschool.org

Domain Age

20y 6m

Created

11.11.2005

Expires

11.11.2026

Last Updated

13.09.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

75/100

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

Typography & Readability

Helvetica

WCAG Partial

57/100

Readability

/30

22/30

16px · LH 1.62

Hierarchy

/20

8/20

WCAG

/25

14/25

2.22:1 min contrast

Performance

/25

13/25

2 fonts · 1 req

Heading Font

Helvetica

Sans

Body Font

Helvetica

Sans16px

Contrast Ratio

2.22:1

10 issues

Reading Comfort

~37 CPL

Narrow lines

38px

22px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Hard to read: Flesch score 41/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 2.2:1).

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

✅ Lean font stack: 2 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 41

Color Palette

8 unique colors

Light

#ffffff

Primary· 51.4%

#0566ab

Accent· 25.000000000000004%

#2a89c7

Accent· 5%

#3e3b5e

Secondary· 4.7%

#8ac1d6

Secondary· 4.5%

#97957b

Secondary· 4.5%

#034f8c

Accent· 0.4%

Business & Marketing Stack

3 Tools Detected

Advanced

Marketing Automation

MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

Google AnalyticsFree

Matomo (Piwik)Mid-Market

User behavior and product analytics

Sponsored

Scripts & Styles

13 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(2)scienceinschool.org(2)webanalytics.web.cern.ch(1)google-analytics.com(1)cdnjs.cloudflare.com(1)

Website Identity