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casel.org

https://casel.org· First analyzed 26 Apr 2026· Updated 26 Apr 2026
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casel.org
Desktop screenshot of casel.org
Mobile screenshot of casel.org
Mobile

Sponsored

Hosting Provider

Rackspace
rackspace.com

IP Address

104.130.124.63

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Dallas, United States

ASN

AS33070

Organization

Rackspace Cloud Servers

Server

Apache

CDN

Cloudflare

WAF

Cloudflare

Nameservers

lou.ns.cloudflare.com.aria.ns.cloudflare.com.

Performance

86

Core Web Vitals

Weight

First Contentful Paint
1.8 s10%
Speed Index
2.3 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
342 KB
54 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPress
cms

Technology Stack

16 Technologies Detected

Fonts

3
Google FontsAdobe Fonts (Typekit)Adobe Fonts

Analytics

3
Google Analytics
Google Analytics 4
Hotjar

Plugins

3
Yoast SEO
Contact Form 7
Jetpack

Libraries

2
jQueryv3.7.1
jQuery UI

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Tag Managers

1
Google Tag Manager

Advertising

1
LinkedIn Ads

Web Servers

1
Apachev2.4.66

SEO Analysis

A84/100
23
8
0
Meta Tags14/15
Content12/12
Headings8/8
Technical23/25
E-E-A-T3/7
Images2/7
Links5/5
URL5/5
Social4/5
Freshness4/4
Mobile1/4
Indexability3/3
C
casel.orgcasel.org

Advancing Social and Emotional Learning - CASEL

CASEL is helping make evidence-based social and emotional learning an integral part of education, preschool through high school.

Title Length47 chars

Recommended: 50-60 chars (~281px / 580px)

Description Length128 chars

Recommended: 120-160 chars

Issues (0)

    8 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    9 URLs

    9 sub-sitemaps

    robots.txt

    7 rules

    Local SEO

    Local Search Readiness

    21/100
    Needs Work
    6 10 1

    Sponsored

    AI & LLM Readiness

    D49/100
    Bot Access
    20/25
    Machine Read.
    6/25
    Schema Data
    4/25
    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
    blockquotesnav
    Text ratio:15%
    Words:3,516
    Token eff.:Poor Structure
    Sections/1K:0.6
    Depth:2/5

    Structured Data

    4 JSON-LD
    WebSiteBreadcrumbListSearchAction

    Citation Readiness

    Opening Summary26w
    Descriptive Headingsavg 3.3w
    Canonical URL
    Open Graph3/3
    Twitter Card1/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (9)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    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.
    A
    80/100
    13
    Passed
    1
    Critical
    2
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    17/20
    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
    13/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    5/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    1 recommendation
    • •Accessibility recommendation preview...
    Upgrade to view recommendations

    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.
    77/100
    A+
    35 mg
    CO₂e / view
    342.4 KB
    Page Weight
    90%
    Cleaner Than
    New Visitor
    40 mg
    vs
    Returning (cached)
    20 mg
    Annual (10K/mo)
    4.2 kg
    Emission Segments
    Data Center
    2 mg
    Network
    10 mg
    Device
    23 mg
    Resource Breakdown
    JavaScript
    200.7 KB
    Images
    37.6 KB
    CSS
    77.0 KB
    Fonts
    2.2 KB
    HTML
    24.9 KB
    Green Hosting Verified
    Rackspace
    Provider Match
    3 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    0%Critical
    Critical / Transactional

    HTTPS

    No WAF

    50d

    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/1.1

    Valid From

    18.03.2026

    Valid Until

    16.06.2026

    Subject Alternative Names (9)

    casel.orgdrc.casel.orgleadingwithsel.orgpg.casel.orgschoolguide.casel.orgselexchange.casel.orgsignaturepractices.casel.orgwww.casel.org+1 more

    SHA-256 Fingerprint

    76:AA:BE:A0:63:11:65:B4:C8:3A:5A:40:60:77:4A:46:43:A5:FF:D3...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    accept-ranges
    bytes
    access-control-allow-origin
    *
    cache-control
    🟡 3s(max-age=3, must-revalidate)
    connection
    Keep-Alive
    content-encoding
    📦 Gzip(gzip)
    content-length
    25231
    Good Warning Issue

    Email Infrastructure

    Microsoft 365

    Score

    93

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (1)

    casel-org.mail.protection.outlook.com

    Domain Information

    casel.org

    Domain Age
    27y 5m

    Created

    16.11.1998

    Expires

    15.11.2027

    Last Updated

    22.09.2022

    Registrar

    Network Solutions, LLC

    DNSSEC
    Not Enabled

    Privacy & Compliance

    CookieYes

    Cookie Consent Banner
    CookieYes
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: CookieYes
    Privacy policy page linked

    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
    61/100
    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
    3 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Libre Baskerville + acumin-pro

    WCAG Partial
    78/100
    Readability
    /30
    24/30

    18px · LH 1.50

    Hierarchy
    /20
    18/20

    4x ratio · ✓ H1→H6

    WCAG
    /25
    16/25

    1:1 min contrast

    Performance
    /25
    20/25

    2 fonts · 3 req

    Heading Font

    Libre Baskerville

    Serif72px

    Body Font

    acumin-pro

    Sans18px

    Contrast Ratio

    1:1

    1 issue

    Reading Comfort

    ~33 CPL

    Narrow lines
    72px
    h1
    48px
    h2
    32px
    h3
    16px
    h4
    18px
    p

    ✅ Excellent readability: 18px body text is ideal for all devices.

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

    ⚠️ Hard to read: Flesch score 40/100. Simplify sentences for wider reach.

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

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ✅ Strong hierarchy: Headlines are 4.0x larger than body text.

    GGoogle FontsAAdobe FontsFlesch 40

    Color Palette

    12 unique colors
    2.83:1 Fail Light
    #ffffff
    Background· 22%
    #9e9993
    Other· 2.7%
    #1375d3
    Primary· 17.1%
    #281c09
    Accent· 13.1%
    #0467c5
    Accent· 9.3%
    #c99b7d
    Secondary· 7.9%
    #e0c2b6
    Secondary· 7.8%
    #674f35
    Secondary· 7.5%

    Business & Marketing Stack

    5 Tools Detected

    Enterprise

    Behavior Analytics

    3
    Google Tag ManagerFree
    Google AnalyticsFree
    HotjarMid-Market

    User behavior and product analytics

    Advertising

    1
    LinkedIn AdsEnterprise

    Ad platforms and retargeting pixels

    Privacy & Cookies

    1
    GDPR Cookie ConsentFree

    Cookie consent and privacy compliance tools

    3

    Categories

    5

    Total Tools

    1

    Enterprise

    1

    Mid-Market

    Assessment: Sophisticated marketing and sales technology infrastructure

    Sponsored

    Scripts & Styles

    26 Resources

    20
    Scripts
    6
    Styles
    8
    Async
    0
    Defer

    Top Script Sources

    casel.org(10)youtube.com(2)googletagmanager.com(2)snap.licdn.com(1)static.hotjar.com(1)

    Website Identity

    Advancing Social and Emotional Learning - CASEL

    CASEL is helping make evidence-based social and emotional learning an integral part of education, preschool through high school.

    casel.org/
    27 years old

    815 West Van Buren St., Suite 210Chicago, IL 60607-3566

    Location detected: 🇺🇸 United Statesvia ip
    Network Solutions, LLC📧 Microsoft 365en

    Sponsored

    Last analyzed: 26 Apr 2026 at 09:42

    Historical Analysis & Change Tracking