Deliverable 6.4 “Educational Modules” is one of the key exploitation outputs of GES4SEAS, prepared within Work Package 6 under the lead of Scitation (Science Crunchers), with AZTI and HCMR. It translates the project’s science and its six key messages into a complete, ready-to-use educational resource for marine educators, teachers, learners and relevant stakeholders, compiling six interconnected modules — one per key message — designed to raise ocean literacy and foster responsible attitudes and behaviours towards the sea. The six modules are: • Module 1 — Healthy seas for healthy human societies. • Module 2 — Pressures in the marine environment: 1 + 1 is not always 2. • Module 3 — Good Environmental Status and how it can affect your health and life (Black Sea case study). • Module 4 — Tipping points: small changes that trigger big shifts. • Module 5 — Ecosystem-Based Management: managing the whole or the hole. • Module 6 — Ocean optimism: rewriting the narrative of our seas. Each module is structured pedagogically, opening with learning outcomes and a sequence of lessons that combine accessible text, embedded videos and infographics (including GES4SEAS materials such infographics and animated videos), real-world case studies from the project’s Learning Sites and partners, and “check your understanding” activities. Each module closes with final considerations and a curated set of additional resources linking to complementary lesson plans from established initiatives (e.g. the Network of European Blue Schools, MED EDUC, the IOC-UNESCO Ocean Literacy toolkit). The modules are self-contained yet sequential, so they can be used individually or as a progressive learning pathway.