• A group of people with blue backpacks stand on a balcony facing a scenic view. A red sign reads DO WHAT WORKS, HAZ QUE FUNCIONE. Trees and tall buildings are in the background beneath a clear sky. Un grupo de personas con mochilas azules estĆ”n en un balcón mirando un paisaje bonito. Un cartel rojo dice DO WHAT WORKS, HAZ QUE FUNCIONE. Se ven Ć”rboles y edificios altos bajo un cielo despejado.

    Welcome

    AC3 Saturday STEM opening its programs to the public starting April 2026

  • A group of adults and kids stand on a platform with orange rails, gazing at green mountains beneath a blue, partly cloudy sky. Un grupo de adultos y niƱos estĆ” en una plataforma con barandas naranjas, mirando montaƱas verdes bajo un cielo azul con nubes.

    Join us this summer

    Middle school and high school Summer Science Explorations

    Advanced, week-long science enrichment programs for young science enthusiasts. — Registration opens April 23rd.Ā 

Arecibo Center for STEM Education, Computational Skills, and Community EngagementĀ 

Logos of the NSF Arecibo Observatory Historic District and Arecibo C3 STEM Center: gear-bordered blue NSF globe, stylized Arecibo text, and bilingual STEM-related phrases. Logotipos del Distrito Histórico del Observatorio de Arecibo NSF y el Centro STEM C3 de Arecibo: globo azul NSF con borde de engranaje, texto estilizado "Arecibo" y frases bilingües sobre STEM.

Make STEM work for you!

The Arecibo Center for Science Education, Computing, and Community Engagement (Arecibo C3 or AC3) is a science, technology, engineering, and mathematics (STEM) education and research center located at the site of the Arecibo Observatory Historic District, in Arecibo Puerto Rico. AC3 integrates science (ciencia), computing (computación), and community (comunidad) to create a hub for STEM discovery and exploration.

Seamless light gray background with subtle, outlined education and science icons: caps, computers, globes, books, bulbs, flasks. Fondo gris claro continuo con íconos sutiles y delineados de educación y ciencia: birretes, computadoras, globos terrÔqueos, libros, bombillas y matraces.

Building a new future upon a legacy of discovery

A girl wearing glasses and gloves uses a pipette to transfer liquid into a container at a lab workstation, focused on her task. Laboratory equipment and supplies are visible in the background. Una chica con gafas y guantes utiliza una pipeta para transferir lĆ­quido a un recipiente en una mesa de trabajo de laboratorio, concentrada en su tarea. Al fondo se pueden ver equipos y materiales de laboratorio.

Arecibo C3 is advancing a new era of science learning at the NSF Arecibo Observatory Historic District. Building on the Observatory’s internationally recognized legacy of scientific discovery, AC3 is transforming this historic site into a modern center where science, computing, and education come together to serve Puerto Rico and the world. Our vision is to expand access to STEM knowledge and skills, ensuring that science and technology continue to contribute to community strength, economic opportunity, and discovery.

AC3 places a strong emphasis on educators and students, supporting learning from middle school through higher education, while also welcoming families, visitors, and lifelong learners. We believe STEM education is most effective when it is practical, engaging, and connected to real problems and real opportunities. At AC3, visitors are invited to explore science hands-on, educators gain access to new tools and approaches, including helping students discover how STEM connects to future college and career pathways.

Our programs in Puerto Rico focus on hands-on learning and real research experiences. These include school field trips that introduce students to advanced biology, computing, and data-driven science, as well as summer science programs that provide immersive exposure to modern laboratory and analytical techniques. AC3 also offers teacher professional development, community-based computing programs, makerspaces, and course-based research experiences that link STEM learning to local environments and challenges. We also aim to provide opportunities that will strengthen STEM communities in Puerto Rico and beyond.

As a growing STEM center, Arecibo C3 continues to develop new programs, partnerships, and public offerings. Rooted in a world-renowned scientific legacy and focused on the future, AC3 is becoming a central hub for STEM education, exploration, and collaboration in Puerto Rico.

Tour Science and Visitor Center

A group of people with blue backpacks by an orange railing, a red flag says ā€œDO WHAT WORKS HAZ QUE FUNCIONE,ā€ clear blue sky. Un grupo de personas con mochilas azules junto a una barandilla naranja; bandera roja: ā€œDO WHAT WORKS HAZ QUE FUNCIONE.ā€ Cielo azul claro.

Plan a school field trip

A student in glasses and a blue sports jersey uses a pipette in science class, focused on filling a test tube as others work behind. Un estudiante con gafas y camiseta azul usa una pipeta en clase de ciencias, atento al tubo de ensayo mientras otros trabajan detrƔs.

Attend a course or workshop

A woman teaches at the front of a classroom with students on laptops; a projector behind her shows technical info. Una mujer enseña al frente de un aula con estudiantes usando portÔtiles; detrÔs, un proyector muestra información técnica.

Stay updated — Join our mailing list

Join the mailing list by completing the embedded form above, or use the accessible form link available in Spanish or English.

This material is based upon work supported by the U.S. National Science Foundation (NSF Awards ID 2321759, 2321760, and 2321761. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the U.S. National Science Foundation. See our about page.

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