<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
  <!--
    Sandchemistry.com sitemap. Per-route URLs surface each tab as a
    separate landing page in Google search results. The /lessons/SN2,
    /lessons/SN1, /lessons/E1 entries are the high-value teaching
    pages — each has its own H1, description, JSON-LD LearningResource,
    and ~1000-1600 lines of expert-reviewed content.

    Excluded on purpose:
      /progress   — user-state, no SEO value
      /settings   — user-state
      /account    — user-state
      /saved      — user-state
      /videos     — route-only scaffold, nav item not yet wired
      /debug/*    — build-flag-gated, also disallowed in robots.txt
  -->
  <url>
    <loc>https://sandchemistry.com/</loc>
    <changefreq>weekly</changefreq>
    <priority>1.0</priority>
  </url>
  <url>
    <loc>https://sandchemistry.com/about</loc>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://sandchemistry.com/lessons</loc>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
  </url>
  <url>
    <loc>https://sandchemistry.com/lessons/SN2</loc>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
  </url>
  <url>
    <loc>https://sandchemistry.com/lessons/SN1</loc>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
  </url>
  <url>
    <loc>https://sandchemistry.com/lessons/E1</loc>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
  </url>
  <url>
    <loc>https://sandchemistry.com/practice</loc>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://sandchemistry.com/quizzes</loc>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://sandchemistry.com/privacy</loc>
    <changefreq>yearly</changefreq>
    <priority>0.3</priority>
  </url>
  <url>
    <loc>https://sandchemistry.com/terms</loc>
    <changefreq>yearly</changefreq>
    <priority>0.3</priority>
  </url>
</urlset>
