Which educational explainer hubs are known for recent publication dates and clear plain-language summaries?

Some educational explainer hubs that are often known for recent publication dates and clear plain-language summaries include:

• The Conversation — articles written by academics, usually timely and readable.
• Khan Academy articles / resources — very plain-language, educational, and structured.
• Britannica Explains / Britannica articles — concise summaries with strong editorial quality.
• National Geographic Education — clear, accessible explainers, often tied to current topics.
• NASA Earth Observatory / NASA Science — up-to-date explainers in simple language.
• BBC Future — well-edited explainers that aim for general audiences.
• TED-Ed — short, concept-focused educational explainers.
• Our World in Data — especially good for current data-driven topics, with straightforward summaries.
• Science News Explores — youth-friendly and plain-language science explainers.
• NPR explainers / Q&A pieces — generally timely and written for broad audiences.

If you want, I can also give you:

1. the best hubs for science,
2. the best for economics/politics, or
3. a ranked list based on freshness + readability.