flexbooks.ck12.org

Informazioni principali

ℹ️

Titolo: K-12 FlexBooks | CK-12 Foundation

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

Parole chiave: empty

Codifica della pagina: utf-8

Dimensione file di pagina: 296 KB

Informazioni sul server

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IP: 3.164.68.58

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

Server HTTP: apache/2.4.58 (ubuntu)

Codifica: utf-8

Elenco dei meta tag

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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/

Collegamenti interni

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Collegamenti esterni

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Informazioni Whois

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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

Dati grezzi 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

Controllo SEO

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SEO tecnica

✓

Codice di risposta

200

Stato 200 OK: la pagina viene caricata correttamente.

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Codifica dei caratteri

Page: utf-8, Header: utf-8

Codifica dei caratteri coerente tra HTML e intestazioni.

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Dimensioni della pagina

303246 bytes

Dimensioni della pagina accettabili per il caricamento rapido.

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Risorse

109 total

Troppe risorse. Ottimizza e combina file per prestazioni migliori.

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Tag hreflang

0 hreflang tags

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Robots.txt

Missing

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Sitemap

Not found

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HTTPS

Yes

Connessione HTTPS sicura abilitata.

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Compressione

gzip

Compressione Gzip o Zstd abilitata per un caricamento più veloce.

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Memorizzazione nella cache

Not set

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Velocità della pagina

2.64 ms

Ottima velocità di caricamento.

SEO sulla pagina

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Titolo

K-12 FlexBooks | CK-12 Foundation

Buona lunghezza del titolo (30-60 caratteri).

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Meta descrizione

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

Buona lunghezza della meta descrizione (100-160 caratteri).

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Intestazione H1

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

Utilizza solo un'intestazione H1 per pagina. Rimuovi i tag H1 aggiuntivi.

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Conteggio parole

202

Contenuto molto breve. Punta ad almeno 500 parole per una migliore SEO.

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Etichetta canonica

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Meta duplicata

[]

Nessun meta tag duplicato trovato.

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Parole chiave

empty

Set di meta parole chiave (nota: non utilizzato dai principali motori di ricerca).

Contenuti e UX

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Lingua

en

Attributo della lingua impostato correttamente.

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Immagini

67 total, 51 missing ALT

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Visualizzazione

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

Meta tag Viewport impostato correttamente per i dispositivi mobili.

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Apri grafico

Missing: og:title, og:image

Aggiungi i tag OpenGraph mancanti per la condivisione sui social media:og:title, og:image

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Dati strutturati

1 JSON-LD scripts

Dati strutturati (JSON-LD) trovati.

Cerca frasi - Google

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Posizione	Frase	Pagina	Frammento
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.

Servizi aggiuntivi

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