hmco.com
HMH: K-12 Learning Company
Last scanned Jul 26, 2026, 4:17 PM
Overall score
Fair
Summary
A K–12 learning company, HMH delivers integrated curriculum, assessment, and professional learning to help educators create growth for every student. This website uses Nginx behind CloudFront CDN. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores poor (35/100) and performance good (80/100). Top issue: robots.txt not found.
A K–12 learning company, HMH delivers integrated curriculum, assessment, and professional learning to help educators create growth for every student.
Top issues to fix
7 issues found · 1 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
4 cookies without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
+1 more issue — details in the sections below.
SEO
2 issue(s) found
Performance
1.99 s
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
Meta tags
- Title
- HMH: K-12 Learning Company
- Description
- A K–12 learning company, HMH delivers integrated curriculum, assessment, and professional learning to help educators create growth for every student.
- Canonical
- https://www.hmhco.com/
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width,initial-scale=1
- Robots meta
- index, follow
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- CloudFront
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- GlobalSign nv-sa
- Subject
- imperva.com
- Valid from
- Jun 8, 2026
- Valid to
- Sep 6, 2026
- Days until expiry
- 39
- SAN domains
- *.unitsofstudy.com, pre.channelone.com, *.gomathacademy.com, digital.fountasandpinnell.com, analytics.gogetwaggle.com, www.gogetwaggle.com, fpdms.heinemann.com, *.edr00.slkcut01.nwea.org, cert-staging.hmhco.com, heinemann.com, searchit.heinemann.com, *.pilot.listeningtolearn.com, *.prod.webpr.heinemann.com, authors.heinemann.com, demo-resources.fountasandpinnell.com, *.perf.nwea.org, fandpleveledbooks.com, instruct.gogetwaggle.com, pilot-qa.listeningtolearn.com, ak-assess-qa01.state.nwea.org, *.cert.webnp.hmhco.com, gomathacademy.com, hmhbooks.com, www.mathsolutions.com, practice-cert.gogetwaggle.com, hmhco.com, onlinepd.heinemann.com, *.hrw.com, fountasandpinnell.com, *.heinemann.com, fpblog.fountasandpinnell.com, *.int.tsg.hmhco.com, mosaic.heinemann.com, *.cert.hmhco.com, *.listeningtolearn.com, *.ep.hmhpub.com, *.hmhbooks.com, *.cms.nwea.io, *.nwea.us, access.auth.nwea.org, www.heinemann.com, *.mapnwea.org, sample.heinemann.com, *.cert.webnp.heinemann.com, *.fountasandpinnell.com, *.nwea.org, *.pilot-qa.listeningtolearn.com, gogetwaggle.com, securedirectsync.gogetwaggle.com, myproducts.heinemann.com, *.cert.ips-nonprod.hmhco.com, prod-staging.hmhco.com, *.thinkcentral.com, fountasandpinnell.heinemann.com, digital-fountasandpinnell.heinemann.com, *.ptldor02.nwea.org, papi.hmhco.com, *.demo.heinemann.com, resources-fountasandpinnell.heinemann.com, cert.hmhco.com, cs41sf.hmhco.com, hapi.hmhco.com, fandpleveledbooks.heinemann.com, *.gogetwaggle.com, resources.fountasandpinnell.com, *.cert.heinemann.com, blog.heinemann.com, channelone.com, *.cms-dev.nwea.org, analytics-cert.gogetwaggle.com, *.cert.mapnwea.org, *.regieroutman.com, imperva.com, na49sf.hmhco.com, pilot.listeningtolearn.com, instruct-cert.gogetwaggle.com, practice.gogetwaggle.com, *.tgds.hmhco.com, regieroutman.com, *.mathsolutions.com, *.fandpleveledbooks.com, cert-waf.hmhco.com, ltl.heinemann.com, *.channelone.com, *.hmhco.com, listeningtolearn.com, *.cert.nwea.org, *.auth.perf.nwea.org, thinkcentral.com, mathsolutions.com, *.hmhpub.com, *.prod.ips-prod.hmhco.com, pdhandouts.heinemann.com
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyEnabled
Compression: gzip · 4 cookie(s) observed
Content & assets
Headings
H1 1 · H2 7 · H3 2
Links
95 internal · 11 external · 20 broken
Images
27 total · 0 missing alt
Scripts / Styles
8 scripts · 1 stylesheets
JS / CSS size
1.7 KB · 0 B
Page size
499 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://hmco.com
- Final URL
- https://www.hmhco.com/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 1.98 s
- HTML size
- 499 KB
- Redirect chain
- https://hmco.com → https://www.hmhco.com/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does hmco.com use?
- hmco.com is built with Nginx.
- Is hmco.com secure (HTTPS)?
- Yes. hmco.com uses TLS 1.3 with a certificate issued by GlobalSign nv-sa, valid until Sep 6, 2026.
- Who hosts hmco.com?
- Hosting provider information for hmco.com is not available yet.
- What is hmco.com's SEO score?
- hmco.com scored 90/100 for SEO in the latest analysis (excellent).
- What is hmco.com's overall website score?
- hmco.com has an overall SiteGraph score of 76/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card