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Category benchmark · Snapshot 23 October 2026

Education & Online Learning: website readiness

31 configuration checks across 1,516 Education & Online Learning sites from the SID website catalog, with 686 individual profiles for sites in the Chrome UX Report top 50K.

Sites measured
1,516

all popularity bands

Median readiness index
61/100

all sites: 64

Profiles
686

top-50K sites

Weakest lane
Recover

lowest weighted score

Readiness by lane

Enable

75/100

All sites 77

Harden

54/100

All sites 56

Accelerate

57/100

All sites 64

Recover

13/100

All sites 10

Biggest gaps for Education & Online Learning sites

The checks with the most room to improve, weighted by impact.

  1. HSTS kept for at least a year

    34% observed · all sites 34%

    Send Strict-Transport-Security on HTTPS responses. Start with a short max-age (for example 300 seconds), confirm every subdomain works over HTTPS, then raise it in steps to 31536000. Add includeSubDomains only when all subdomains are HTTPS. HSTS preload is optional and hard to undo; hstspreload.org itself does not recommend it by default.

    Guide: HTTPS and TLS Guide for Website Owners

  2. Modern image formats in use

    32% observed · all sites 40%

    Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.

    Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format

  3. DMARC policy enforces quarantine or reject

    36% observed · all sites 39%

    Publish DMARC with p=none and a reporting address first, fix any legitimate senders that fail SPF or DKIM alignment, then move to quarantine and finally reject.

    Guide: A Practical Website Health Check for Owners

  4. security.txt published

    5% observed · all sites 7.1%

    Publish /.well-known/security.txt with at least Contact and Expires fields, as RFC 9116 requires, and review it before it expires.

    Guide: A Practical Website Health Check for Owners

  5. CAA records limit who can issue certificates

    13% observed · all sites 13%

    Publish CAA records naming every CA you actually use, including the CAs your CDN uses for managed certificates. Add an iodef contact if you want reports.

    Guide: HTTPS and TLS Guide for Website Owners

  6. Static files cached for 30 days or more

    45% observed · all sites 51%

    Give versioned (fingerprinted) CSS, JavaScript, fonts and images Cache-Control: public, max-age=31536000, immutable, and change the file name whenever the content changes.

    Guide: Browser Caching Guide for Website Owners

Where Education & Online Learning sites lead

  • robots.txt published82% observedall sites 76%
  • Referrer-Policy set27% observedall sites 24%

Stack mix

CDN and edge

Platform or framework

DNS operator

Certificate authority

Readiness leaders

Education & Online Learning sites in the top 50K with the highest share of observed practices (at least 26 of 31 checks measured). This lists only what we observed on 23 October 2026; owners can request a correction.

  1. letudiant.fr92/100
  2. preply.com90/100
  3. evvelcevap.com90/100
  4. taleem360.com89/100
  5. studyinsaudi.sa86/100
  6. novakidschool.com86/100
  7. thedailycampus.com86/100
  8. edurev.in85/100
  9. exam.net85/100
  10. kenhub.com85/100

All 31 checks for Education & Online Learning

CheckLaneObservedAll sitesMeasured
HTTP requests move to HTTPSHarden92%91%1,397
HSTS kept for at least a yearHarden34%34%1,508
TLS 1.3 negotiatedHarden86%91%1,489
Certificate has more than 14 days leftHarden99%99%1,489
Certificate lifetime of 100 days or lessHarden60%67%1,489
CAA records limit who can issue certificatesHarden13%13%1,515
DNSSEC signedHarden8.1%8%1,512
security.txt publishedHarden5%7.1%1,468
DMARC policy enforces quarantine or rejectHarden36%39%1,514
X-Content-Type-Options: nosniffHarden46%48%1,508
Framing restrictedHarden49%51%1,508
Content Security Policy presentHarden25%32%1,508
Referrer-Policy setHarden27%24%1,508
HTTP/2 negotiatedAccelerate80%90%1,489
HTTP/3 advertisedAccelerate25%37%1,508
HTML compressedAccelerate90%93%1,497
Static files cached for 30 days or moreAccelerate45%51%1,345
Modern image formats in useAccelerate32%40%1,288
Offscreen images lazy-loadedAccelerate52%62%1,196
No render-blocking scripts in <head>Accelerate42%48%1,508
robots.txt publishedEnable82%76%1,483
XML sitemap discoverableEnable65%70%1,493
Reachable over IPv6Enable39%48%1,515
Canonical URL declaredEnable62%68%1,508
Meta description writtenEnable84%84%1,508
Mobile viewport configuredEnable97%94%1,508
Structured data presentEnable41%51%1,508
Social preview image setEnable52%57%1,508
Page language declaredEnable91%90%1,508
At most one redirect to the homepageEnable98%98%1,510
Nameservers spread across providersRecover13%10%1,508

Education & Online Learning profiles (1–500 of 686)

Readiness index shown next to each site.