// Add this to your dashboard.php to detect which course was selected
$selectedCourse = isset($_GET['course']) ? $_GET['course'] : 'science'; // Default to Awakening Through Science

// Then you can show different content based on the course
switch($selectedCourse) {
    case 'nature':
        // Show Living with Nature content
        break;
    case 'consciousness':
        // Show Consciousness & Self-Knowledge content
        break;
    // etc.
}