The Siemens Stiftung Media Portal

Looking for high-quality teaching material?

The Media Portal offers around 3,200 open educational resources to help teachers provide a diverse, real-world-oriented classroom experience. Whether it’s mathematics, biology, computer science, physics, or chemistry: Here you’ll find a large selection of free digital teaching materials – from worksheets to content packages for interactive whiteboards to exciting educational games. Are you using methods such as inquiry-based learning, inclusive learning, Service-Learning or Design Thinking? Our Media Portal has lots of information and materials on this as well.

The Media Portal and the materials are available in English and German. The roughly 1,300 Spanish media have been moved to our new CREA (Centro de Recursos Educativos Abiertos) educational portal for Latin America.


The latest events, links to interesting portals, news from the OER community, and recent insights into the use of digital media in the classroom.

Upcoming events

Open Education Week celebrates 10th anniversary

From March 7 to 11, 2022, OE Week will begin its annual exchange on the latest achievements of Open Education around the world – online, free, and open to all. Be inspired, learn about new projects, or submit your own contribution.

Playing with the climate – and learning a lot

Global warming can only be stopped if everyone works together: In the multiplayer game KEEP COOL mobil, your students virtually take control of global metropolises and directly experience how their local decisions impact the global climate. But watch out: If the temperature indicator increases by over 2°C, everyone loses the game!

Register now: First global 48-hour festival all about OER

The first will take place December 9-11, co-hosted by the German Commission for UNESCO. For 48 hours online, everyone worldwide can learn, share, and network about Open Education. You will learn about international projects and players true to the motto “Act locally – share globally.”

CREA launches – Our new education portal for Latin America

Centro de Recursos Educativos Abiertos, or CREA, is our new home for the materials of the previous „Portal de Medios“, combined with a variety of additional educational offerings developed by our cooperation network in Latin America. Everything will remain the same for German- and English-speaking users.

Online lessons and distance learning

School closures are very challenging for all of you. In addition to the about 4,300 OER for STEM lessons, the Media Portal offers useful functions that can support you in networked teaching and learning with your students and their parents. Have a look to the most important ones here.

View all news


Make the classroom your laboratory

Our international educational program Experimento presents real-world science and technology content. Students can work entirely on their own to discover interrelationships around the themes of health, energy, and the environment. The content addresses value-shaping issues to help students develop socially aware, conscientious behavior.

All Experimento media can be found here.


Here you can find our editor picks: media packages on topical themes or materials that were particular favorites among our users ...

New: Basics of micro­controller programming

How could you determine the concentration of COVID-19 virus aerosols in a classroom? How do you modify an Arduino sketch so that an LED blinks differently? These and other questions are addressed in ten experiments in our new media package Basics of microcontroller programming – using Arduino. The goal is to show students how programming works and to convey ways of thinking that help them in the digitalized world (Computational Thinking).

New: Value education in STEM lessons

The Value education in STEM lessons media package contains worksheets for students and the related instructions for teachers to support value education in STEM teaching. It uses methods such as biographical learning, the value square, and the imaginary journey. The 12 individual media files are suitable for grades 1 to 9.

New: Vocational Orientation WBT as individual media

The videos and audio interviews included in the Web-based trainings Being an agripreneur and Being an electrician are now also available individually. This allows teachers to access them instantly without navigating through the whole training course. Educators can leverage the Vocational Orientation content on the Media Portal to support their efforts to bridge the gap between STEM theory and practice.

New: Online training on Computational Thinking

In the discussion of what skills students need to be well prepared for living in the digital world, Computational Thinking has gained importance. It promotes critical and analytical thinking and specifically enables systematic problem-solving processes to be effectively integrated into STEM lessons. Our new training section provides an interactive training on Computational Thinking: It offers insights into the topic and shows how it can be enhanced in class.

New: Flash has moved to HTML

We’ve done it! We have gradually converted all of our Flash media to HTML format. As a result, around 450 media and over 40 interactive whiteboards are available again on the Media Portal in three languages for use in class. You can load them directly as usual in all current browsers, including on mobile devices. You don’t have to install or upgrade anything because Firefox, Opera, Safari, and other browsers support HTML format.

View all highlights

Stay up-to-date!

About four times a year, we inform you about new media on this portal as well as current studies and events related to OER and STEM.

Media Portal newsletter – register now

About four times a year, we inform you about new media on this portal as well as current studies and events related to OER and STEM.

*Required fields


Liebe Nutzerin, lieber Nutzer,
El Portal de Medios – das spanische Medienportal – ist umgezogen und heißt nun CREA.
Auf CREA finden Sie weiterhin hochwertige Medien für den MINT-Unterricht und vieles mehr.

Dear User,
El Portal de Medios - the Spanish Media Portal - has moved and is now called CREA.
On CREA, you will continue to find high-quality media for STEM education and much more.

Estimado usuario, estimada usuaria,
El Portal de Medios – en español – ha sido trasladado y ahora se llama CREA.
En CREA seguirá encontrando medios de alta calidad para la enseñanza de STEM, y mucho más.

Zu CREA wechseln / Switch to CREA / Cambiar a CREA
CREA - El Portal de Medios para la Enseñanza STEM

Hierbleiben / Stay here / Quédate aquí:
Fenster schließen / Close window / Cerrar ventana