Practise mathematics online - the new site of Mathefritz

Privacy policy -

Data protection

The use of our website is generally possible without providing personal data. As far as on our sides personal data (such as name, address or e-mail addresses) are collected, this is as far as possible on a voluntary basis. This data will not be passed on to third parties without your express consent.

We would like to point out that data transmission on the Internet (e.g. communication by e-mail) can have security gaps. A complete protection of the data against access by third parties is not possible.

The use of contact data published within the framework of the imprint obligation by third parties for the purpose of sending unsolicited advertising and information material is hereby expressly prohibited. The operators of the pages expressly reserve the right to take legal action in the event of the unsolicited sending of advertising information, such as spam mails.

The Data Protection Officer is:

Jörg Christmann, Pfaffenkopfstr. 21E, 66125 Saarbrücken, phone: 06897 500 9490 ; e-mail: verlag( a t ) mathefritz (.) de

We support the protection of the privacy of our users. Personal data is only used in accordance with the following declaration on data protection and data security (Privacy Policy).

This is what we learn about you when you use our Internet offer

The web server of this website is operated on our behalf by the company ALL-INKL.COM - Neue Medien Münnich, D-02742 Friedersdorf. With each request of an internet file the following access data are stored:

  • the page from which the file was requested
  • the name of the called file 
  • the date and time of the request
  • the volume of data transferred
  • the access status (file transferred, file not found, etc.)
  • the description of the type of web browser or operating system used
  • the IP address of the requesting computer

The basis for data processing is Art. 6 (1) lit. b DSGVO, which permits the processing of data for the fulfilment of a contract or pre-contractual measures.

The stored data is used exclusively for technical or statistical purposes. These purposes represent a legitimate interest for us to collect the data. A comparison with other data or a transfer to third parties does not take place. As the operator of this website, we reserve the right to check the server log files retrospectively if there are concrete indications of illegal use. No personal usage profile is created. The data will be deleted after 30 days at the latest.

Data when transmitting an order

The data provided by you will be used by us for the fulfilment and processing of an order. Your data may be passed on to the shipping company which is commissioned by us with the delivery of the goods. The data will only be passed on insofar as this is necessary for the delivery of the goods. Your data will not be passed on to other third parties or used for advertising purposes. With complete execution of the contract, your data will be blocked for further use and deleted after expiry of the tax and commercial law regulations.

You have a right to free information about your stored data and, if applicable, a right to correction, blocking or deletion of this data. For corresponding information please contact: Mathefritz Media Jörg Christmann, Pfaffenkopfstr. 21e, 66125 Saarbrücken, Germany.

Contact form

If you send us enquiries via the contact form, your details from the enquiry form, including the contact details you provide there, will be stored by us for the purpose of processing the enquiry and in the event of follow-up questions. We do not pass on this data without your consent.

The processing of the data entered in the contact form is therefore based exclusively on your consent (Art. 6 para. 1 lit. a DSGVO). You can revoke this consent at any time. For this purpose, an informal communication by e-mail to us is sufficient. The legality of the data processing operations carried out until the revocation remains unaffected by the revocation.

The data you enter in the contact form will remain with us until you request us to delete it, revoke your consent to store it or the purpose for storing the data no longer applies (e.g. after we have completed processing your request). Mandatory legal provisions - in particular retention periods - remain unaffected.

Newsletter function

If you would like to receive a newsletter offered on the website, we require an e-mail address from you as well as information that allows us to verify that you are the owner of the e-mail address provided and that you agree to receive the newsletter.

We use the so-called double-opt-in procedure to ensure a consensual newsletter dispatch. In the course of this, the potential recipient is first added to a distribution list. Subsequently, he/she receives the opportunity to confirm the registration in a legally secure manner by means of a confirmation e-mail. Only if the confirmation takes place, the address is actively included in the distribution list.

We use the data entered by the user for the purpose of sending the requested information and offers.

A Joomla module from the company AcyMailing is used as newsletter software. Your data will only be stored on our own servers and will not be passed on to third parties.

Advertising on

Mathefritz Verlag uses third-party vendors to serve ads when you visit our website. These companies may use information (this does not include your name, address, email address or telephone number) about your visits to this and other websites in order to serve ads about products and services of interest to you.


If you agree, this website uses so-called cookies. These serve to make our offer more user-friendly, more effective and safer. Cookies are small text files that are stored on your computer and saved by your browser. Most of the cookies we use are so-called "session cookies". They are automatically deleted at the end of your visit. Cookies do not cause any damage to your computer and do not contain viruses.

Privacy policy for the use of Google Analytics

Insofar as you have given your consent to cookies, this website uses Google Analytics, a web analytics service provided by Google, Inc. ("Google"). The use includes the operating mode "Universal Analytics". This makes it possible to assign data, sessions and interactions across multiple devices to a pseudonymous user ID and thus analyse a user's activities across devices. This data protection notice is provided by

Google Analytics uses "cookies", which are text files placed on your computer, to help the website analyze how users use the site. The information generated by the cookie about your use of the website will be transmitted to and stored by Google on servers in the United States. In the event that IP anonymisation is activated on this website, however, your IP address will be truncated beforehand by Google within member states of the European Union or in other contracting states to the Agreement on the European Economic Area. Only in exceptional cases will the full IP address be transmitted to a Google server in the USA and shortened there. We would like to point out that on this website Google Analytics has been extended to include IP anonymisation in order to ensure that IP addresses are recorded anonymously (so-called IP masking). The IP address transmitted by your browser as part of Google Analytics will not be merged with other Google data. For more information on the terms of use and data protection, please visit or

Purposes of processing
On behalf of the operator of this website, Google will use this information for the purpose of evaluating your use of the website, compiling reports on website activity and providing other services relating to website activity and internet usage to the website operator.

Legal basis
The legal basis for the use of Google Analytics is your consent pursuant to Art. 6 (1) sentence 1 lit. a DSGVO.

Recipients / categories of recipients
The recipient of the collected data is Google.

Transfer to third countries
Personal data is transferred to the USA under the EU-US Privacy Shield on the basis of the European Commission's adequacy decision. You can access the certificate here.

Duration of data storage
The data sent by us and linked to cookies, user IDs (e.g. user ID) or advertising IDs are automatically deleted after 14 months. The deletion of data whose retention period has been reached takes place automatically once a month.

Data subject rights
You can revoke your consent at any time with effect for the future by preventing the storage of cookies by means of a corresponding setting in your browser software; however, we would like to point out that in this case you may not be able to use all the functions of this website to their full extent.

You can also prevent the collection of data generated by the cookie and related to your use of the website (including your IP address) to Google and the processing of this data by Google by downloading and installing the browser add-on. Opt-out cookies prevent the future collection of your data when visiting this website. To prevent collection by Universal Analytics across devices, you must opt-out on all systems used. If you click here, the opt-out cookie will be set:Click here to disable Google Analytics

Privacy policy for the use of Google Adsense

This website partly uses Google AdSense, a service for embedding advertisements of Google Inc. ("Google"). Google AdSense uses "cookies", which are text files placed on your computer, to help the website analyze how users use the site. Google AdSense also uses so-called web beacons (invisible graphics). Through these web beacons, information such as visitor traffic on these pages can be evaluated.

The information generated by cookies and web beacons about the use of this website (including your IP address) and delivery of advertising formats will be transmitted to and stored by Google on servers in the United States. This information may be passed on by Google to contractual partners of Google. However, Google will not merge your IP address with other data stored by you.

You may refuse the use of cookies by selecting the appropriate settings on your browser, however please note that if you do this you may not be able to use the full functionality of this website. By using this website, you consent to the processing of data about you by Google in the manner and for the purposes set out above.

You can prevent the installation of cookies from Google AdSense in various ways:

a) by adjusting the browser software accordingly;
b) by deactivating Google's interest-based ads;
c) by deactivating the interest-based ads of the providers that are part of the self-regulation campaign "About Ads";
d) by permanent deactivation through a browser plug-in.

The settings under b) and c) are deleted when cookies are deleted in the browser settings.

3. more detailed information on data protection and cookies for advertising on Google AdSense can be found in Google's privacy policy, in particular under the following link:

Sources: Privacy policy eRecht24, Facebook disclaimer by eRecht24, Google Analytics privacy policy, privacy policy for Google Adsense,Legal notice Techfacts