tes.com

Readiness by lane

Green: tes.com. Thin bar: Education & Online Learning peer median.

Priority fixes for tes.com

Ordered by impact and by how common each practice is among peers.

1. Priority 1 · Harden

   TLS 1.3 negotiated

   Observed: The TLS connection negotiated TLSv1.2.

   Why it matters: TLS 1.3 removes legacy cipher suites and completes the handshake in fewer round trips, so it is both safer and faster for new connections.

   What to do: Enable TLS 1.3 on your CDN or server. Keep TLS 1.2 available for older clients unless you have checked your audience.

   86% of Education & Online Learning peers do this. Limit: Certificate and protocol were observed from one vantage point; CDNs can present different certificates by region.

   Guide: HTTPS and TLS Guide for Website Owners

2. Priority 2 · Harden

   HSTS kept for at least a year

   Observed: The homepage response did not include a Strict-Transport-Security header.

   What to do: 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.

   34% of Education & Online Learning peers do this.

   Guide: HTTPS and TLS Guide for Website Owners

3. Priority 3 · Accelerate

   Modern image formats in use

   Observed: The homepage had 16 images and none used WebP or AVIF.

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

   32% of Education & Online Learning peers do this.

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

4. Priority 4 · Harden

   Certificate lifetime of 100 days or less

   Observed: The certificate from GlobalSign nv-sa had a 198-day validity period, longer than the 100-day maximum that applies from March 2027.

   What to do: Move to automated issuance and renewal now, while you still have time to test it.

   60% of Education & Online Learning peers do this.

   Guide: HTTPS and TLS Guide for Website Owners

What tes.com already does well

Practices fewer than half of Education & Online Learning peers use.

• DMARC policy enforces quarantine or rejectDMARC policy p=reject.36% of peers
• Reachable over IPv6IPv6 address published.39% of peers
• No render-blocking scripts in <head>Head scripts load without blocking.42% of peers

What we saw

Homepage checked

https://www.tes.com/

Homepage response

HTTP 200

TLS

TLSv1.2, HTTP/2

Certificate

GlobalSign, 198-day validity, expiring 2027-03-31

Platform or framework

Drupal

DNS operators

Amazon Route 53

DMARC policy

p=reject

Homepage HTML

172 KB, gzip

Images on homepage

16 (svg 16)

Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.

Stack and providers

Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.

All 31 checks

Select a gap for the method and fix. How each check works

Compare with other Education & Online Learning sites

• studfile.net65
• study.com65
• takeuforward.org65
• tntextbooks.in65
• turnitin.com65

Education & Online Learning readiness benchmark