teachingtextbooks.com

HTML metadata

Title: Teaching Textbooks -- homeschool math curriculum free trial
Description: The highly acclaimed curriculum that's like having a tutor at your student's side.
Language: en

Open Graph

url: https://www.teachingtextbooks.com/
title: Teaching Textbooks
description: The highly acclaimed curriculum that’s like having a tutor at your student’s side.

Technology

CMS: Gatsby
Stack: PHP

Third-party hosts loaded (5)

content.teachingtextbooksapp.com×3
cdn.jsdelivr.net×1
rum.hlx.page×1
ttv5.s3.amazonaws.com×1
us01ccistatic.zoom.us×1

Social

Registration

Registrar

Network Solutions, LLC

Created

2001-01-20

Expires

2030-01-20 1327 days left

Updated

2024-11-21

Name servers

ns93.worldnic.com
ns94.worldnic.com

DNS records live

NS

ns93.worldnic.com
ns94.worldnic.com

MX

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10 alt3.aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com

TXT

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uber-domain-verification=edb61e6b-6f7e-41dc-921b-3cb82bc28257

Verified for

Microsoft 365

Email authentication partial

SPF

v=spf1 include:spf.mandrillapp.com include:_spf.google.com include:em176.teachingtextbooks.com ~all

softfail (~all)

DMARC

v=DMARC1; p=none

policy: none (monitoring only)

DKIM

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selectors probed

Certificate (current)

R12

from 2026-04-04 to 2026-07-03

Expires in 30 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 80/100 Checked live page: https://www.teachingtextbooks.com/

present

strict-transport-security
content-security-policy
x-frame-options
x-content-type-options

findings

CSP allows unsafe inline scripts/styles
CSP uses wildcard sources
missing Referrer Policy
missing Permissions Policy

Header values

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x-content-type-options: nosniff
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