flexbooks.ck12.org

Glavne informacije

ℹ️

Naslov: K-12 FlexBooks | CK-12 Foundation

Opis: CK-12’s free, standards-aligned, digital textbooks are customizable, integrated, and interactive, allowing users to create 200,000+ localized FlexBooks.

Ključne besede: empty

Kodiranje strani: utf-8

Velikost datoteke strani: 296 KB

Informacije o strežniku

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IP: 3.164.68.58

Lokacija: United States,US,,,37.751,-97.822,America/Chicago

Http strežnik: apache/2.4.58 (ubuntu)

Kodiranje: utf-8

Seznam metaoznak

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property: og:site_name itemprop: name name: author content: CK-12 Foundation
property: fb:app_id content: 159884644067996
itemprop: url content: https://www.ck12.org
itemprop: telephone content: (650) 494-1302
charset: utf-8
name: viewport content: width=device-width, initial-scale=1, minimum-scale=1.0
name: google-site-verification content: wHx0f-Udlfd7ZNYNrIXpJVpjjO8nSH5RE0jIX8V-jIM
name: google-translate-customization content:
name: application-name content: CK-12 Foundation
name: msapplication-TileColor content: #003300
name: msapplication-TileImage content: //static.ck12.org/assets/favicon/web-app-manifest-192x192.png
property: og:description name: description content: CK-12’s free, standards-aligned, digital textbooks are customizable, integrated, and interactive, allowing users to create 200,000+ localized FlexBooks. helmet: true
property: og:url content: https://flexbooks.ck12.org/flexbooks/student/
itemprop: provider content: CK-12 Foundation
itemprop: name
itemprop: description
itemprop: url content: https://flexbooks.ck12.org/flexbooks/student/

Notranje povezave

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Zunanje povezave

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Whois informacije

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domain_name: ck12.org

update_date: 2025-08-07T22:10:54.892Z

update_time: 1754604654

creation_date: 2006-12-16T08:37:03.681Z

creation_time: 1166258223

expiration_date: 2028-12-16T08:37:03.681Z

Surovi podatki Whois

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            Domain Name: CK12.ORG
Registrar: Amazon Registrar, Inc.
Domain Status: client delete prohibited
Domain Status: client transfer prohibited
Domain Status: client update prohibited
Registry Expiry Date: 2028-12-16T08:37:03.681Z
Creation Date: 2006-12-16T08:37:03.681Z
Updated Date: 2025-08-07T22:10:54.892Z
Name Server: NS-1136.AWSDNS-14.ORG
Name Server: NS-161.AWSDNS-20.COM
Name Server: NS-1687.AWSDNS-18.CO.UK
Name Server: NS-977.AWSDNS-58.NET
REGISTRAR Contact: Amazon Registrar, Inc.
>>> Last update of RDAP database: 2026-02-16T21:03:58Z

SEO revizija

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Tehnični SEO

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Odzivna koda

200

Stanje 200 OK - stran se pravilno naloži.

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Kodiranje znakov

Page: utf-8, Header: utf-8

Kodiranje znakov, skladno med HTML in glavami.

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Velikost strani

303246 bytes

Velikost strani sprejemljiva za hitro nalaganje.

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Viri

109 total

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Oznake Hreflang

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Robots.txt

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Sitemap

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HTTPS

Yes

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Stiskanje

gzip

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Predpomnjenje

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Hitrost strani

2.64 ms

Odlična hitrost nalaganja.

SEO na strani

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Naslov

K-12 FlexBooks | CK-12 Foundation

Dobra dolžina naslova (30-60 znakov).

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Meta opis

CK-12’s free, standards-aligned, digital textbooks are customizable, integrated, and interactive, allowing users to create 200,000+ localized FlexBooks. Lenght:152

Dobra dolžina meta opisa (100-160 znakov).

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Naslov H1

2 found - "Interact with Your Math & Science Textbooks in a Whole New Way"

Uporabite samo en naslov H1 na stran. Odstranite dodatne oznake H1.

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Štetje besed

202

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Canonical Tag

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Podvojena meta

[]

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Ključne besede

empty

Nastavljene meta ključne besede (opomba: večji iskalniki jih ne uporabljajo).

Vsebina in UX

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Jezik

en

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Slike

67 total, 51 missing ALT

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Viewport

width=device-width, initial-scale=1, minimum-scale=1.0

Metaoznaka vidnega polja je pravilno nastavljena za mobilne naprave.

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Odpri graf

Missing: og:title, og:image

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Strukturirani podatki

1 JSON-LD scripts

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Iskalne fraze - Google

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Položaj	Fraza	Stran	Izrezek
3	k e q	/cbook/ck-12-chemist...	Equilibrium Constant (Keq) The equilibrium constant (Keq ) is the ratio of the mathematical product of the concentrations of the products of a reaction to the mathematical product of the ...
7	write 6 6 3 4	/cbook/ck-12-cbse-ma...	Divisibility Rules for 2, 3, 4, 5, 6, 8, 9, 10 and 11 A number is divisible 6 if it is divisible by both 2 and 3 . Example of divisibility rule for 6 : Consider the number 47394. Since its units digit is 4 , it is ...
9	types of energy	/cbook/cbse-physics-...	Forms of Energy - Defintion, Types, Formula, Examples ... The six forms of energy include mechanical, chemical, electrical, light, thermal, and sound energy . Another form of energy is nuclear energy.
12	science models	/cbook/ck-12-middle-...	Scientific Models Models allow scientists to work with systems that are nearly impossible to study as a whole. Models help scientists to understand these systems.
14	write the time using words	/cbook/ck-12-first-g...	Time Conversion between Words and Numbers We are going to learn how to write down the time in digits (numbers). ... The most common way to express time in words is just to say the time in the form HOUR ...
22	us class us	/user:coachtgj/cbook...	The American Class System Most sociologists use six class divisions when describing the American class system. Because it is an open system, people are able to move between classes.
22	date mark time 40 minutes	/cbook/ck-12-middle-...	Elapsed Time Elapsed time is the amount of time that has passed between two events. You can calculate the elapsed time by figuring out the difference between the start and ...
26	complete a square	/cbook/ck-12-algebra...	Completing the Square When the Leading Coefficient ... Step 1: Write the polynomial so that and are on the left side of the equation and the constants on the right. Step 2: Pull out from everything on the left side.

Dodatne storitve

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