diff --git a/app/Config/Routes.php b/app/Config/Routes.php
index bd92e8f..d011f96 100644
--- a/app/Config/Routes.php
+++ b/app/Config/Routes.php
@@ -418,6 +418,7 @@ $routes->get('exam-drafts/files/final/(:segment)', 'View\FilesController::examDr
 
 
 
+$routes->get('teacher/progress', 'ClassProgressController::history', ['filter' => 'auth:teacher,teacher_assistant']);
 $routes->get('teacher/progress/submit', 'ClassProgressController::create', ['filter' => 'auth:teacher,teacher_assistant']);
 $routes->post('teacher/progress/store', 'ClassProgressController::store', ['filter' => 'auth:teacher,teacher_assistant']);
 $routes->get('teacher/progress/history', 'ClassProgressController::history', ['filter' => 'auth:teacher,teacher_assistant']);
diff --git a/app/Controllers/ClassProgressController.php b/app/Controllers/ClassProgressController.php
index 64f4cb7..0fdec5c 100644
--- a/app/Controllers/ClassProgressController.php
+++ b/app/Controllers/ClassProgressController.php
@@ -289,7 +289,7 @@ class ClassProgressController extends BaseController
         }
 
         $row['status_label'] = self::STATUS_OPTIONS[$row['status']] ?? 'Unknown';
-        $weeklyReports = $this->reportModel
+        $weeklyReportsQuery = $this->reportModel
             ->select('class_progress_reports.*, cs.class_section_name, CONCAT(IFNULL(u.firstname, ""), " ", IFNULL(u.lastname, "")) AS teacher_name')
             ->join('classSection cs', 'cs.class_section_id = class_progress_reports.class_section_id', 'left')
             ->join('users u', 'u.id = class_progress_reports.teacher_id', 'left')
@@ -346,7 +346,7 @@ class ClassProgressController extends BaseController
             throw new PageNotFoundException('Progress report not found.');
         }
 
-        $weeklyReports = $this->reportModel
+        $weeklyReportsQuery = $this->reportModel
             ->select('class_progress_reports.*')
             ->whereIn('teacher_id', $allowedTeacherIds)
             ->where('class_section_id', $row['class_section_id'])
@@ -513,7 +513,7 @@ class ClassProgressController extends BaseController
             }
         }
 
-        $weeklyReports = $this->reportModel
+        $weeklyReportsQuery = $this->reportModel
             ->select('class_progress_reports.*')
             ->whereIn('teacher_id', $allowedTeacherIds)
             ->where('class_section_id', $classSectionId)
diff --git a/app/Controllers/View/InventoryController.php b/app/Controllers/View/InventoryController.php
index e7fef8f..8d41607 100644
--- a/app/Controllers/View/InventoryController.php
+++ b/app/Controllers/View/InventoryController.php
@@ -3,6 +3,7 @@
 namespace App\Controllers\View;
 
 use App\Controllers\BaseController;
+use App\Exceptions\SchoolYear\SchoolYearWriteConflictException;
 use App\Models\ClassSectionModel;
 use App\Models\InventoryItemModel;
 use App\Models\InventoryCategoryModel;
@@ -713,6 +714,8 @@ class InventoryController extends BaseController
      */
     public function teacherDistributeForm()
     {
+        $schoolYearContext = $this->resolveSchoolYearContext();
+
         // 1) Build teacher/class context (auth/role/no-class handled inside)
         $ctx = $this->buildTeacherClassContext();
         if ($ctx instanceof \CodeIgniter\HTTP\RedirectResponse) {
@@ -858,11 +861,19 @@ class InventoryController extends BaseController
 
             'schoolYear'       => $ctx['schoolYear'],
             'semester'         => $ctx['semester'],
+            'isEditable'       => ! $schoolYearContext->isReadonly(),
         ]);
     }
 
     public function teacherDistributeStore()
     {
+        $schoolYearContext = $this->resolveSchoolYearContext();
+        try {
+            $this->assertSchoolYearWritable($schoolYearContext);
+        } catch (SchoolYearWriteConflictException $e) {
+            return redirect()->back()->withInput()->with('error', $e->getMessage());
+        }
+
         $ctx = $this->buildTeacherClassContext();
         if ($ctx instanceof \CodeIgniter\HTTP\RedirectResponse) {
             return $ctx;
diff --git a/app/Views/inventory/teacher_distribute.php b/app/Views/inventory/teacher_distribute.php
index 0529875..8929142 100644
--- a/app/Views/inventory/teacher_distribute.php
+++ b/app/Views/inventory/teacher_distribute.php
@@ -1,9 +1,18 @@
 <?= $this->extend('layout/main_layout') ?>
 <?= $this->section('content') ?>
+<?php
+  $isEditable = (bool) ($isEditable ?? true);
+  $disabledAttr = $isEditable ? '' : ' disabled';
+?>
 
 <div class="container my-4">
   <h4 class="text-dark mb-3" style="font-family: Arial, sans-serif;">Distribute Books to Students</h4>
   <?= view('partials/flash_messages') ?>
+  <?php if (!$isEditable): ?>
+    <div class="alert alert-info">
+      You are viewing <?= esc($schoolYear ?? 'a closed school year') ?>. Book distribution actions are read-only for closed years.
+    </div>
+  <?php endif; ?>
 
   <!-- Filter bar (GET) — no class section shown -->
   <form id="filterForm" class="row g-3 mb-3" method="get" action="<?= site_url('inventory/books/distribute') ?>">
@@ -43,7 +52,7 @@
     </div>
 
     <!-- Submission form (POST) -->
-    <form method="post" action="<?= site_url('inventory/books/distribute') ?>">
+    <form method="post" action="<?= site_url('inventory/books/distribute') ?>" data-readonly="<?= $isEditable ? '0' : '1' ?>">
       <?= csrf_field() ?>
       <!-- Keep class section hidden -->
       <input type="hidden" name="class_section_id" value="<?= esc($class_section_id) ?>">
@@ -53,8 +62,8 @@
         <div class="card-header d-flex justify-content-between align-items-center">
           <span>Students</span>
           <div class="d-flex gap-2">
-            <button type="button" class="btn btn-sm btn-info" id="checkAllBtn">Check All</button>
-            <button type="button" class="btn btn-sm btn-secondary" id="uncheckAllBtn">Uncheck All</button>
+            <button type="button" class="btn btn-sm btn-info" id="checkAllBtn"<?= $disabledAttr ?>>Check All</button>
+            <button type="button" class="btn btn-sm btn-secondary" id="uncheckAllBtn"<?= $disabledAttr ?>>Uncheck All</button>
           </div>
         </div>
 
@@ -87,7 +96,7 @@
                       class="form-check-input student-box"
                       name="student_ids[]"
                       value="<?= esc($sid) ?>"
-                      <?= $given ? 'checked' : '' ?>>
+                      <?= $given ? 'checked' : '' ?><?= $disabledAttr ?>>
                   </td>
                   <td><?= esc($student['school_id'] ?? '-') ?></td>
                   <td><?= esc($student['firstname'] ?? '') ?></td>
@@ -111,11 +120,11 @@
         <div class="card-footer">
           <div class="mb-2">
             <label class="form-label">Note (optional)</label>
-            <textarea class="form-control" rows="2" name="note" placeholder="e.g., Distributed in class today"></textarea>
+            <textarea class="form-control" rows="2" name="note" placeholder="e.g., Distributed in class today"<?= $disabledAttr ?>></textarea>
           </div>
           <div class="d-flex gap-2">
-            <button type="button" class="btn btn-success">Deduct & Save</button>
-            <button type="button" class="btn btn-secondary" id="clearSelectionBtn">Cancel</button>
+            <button type="button" class="btn btn-success"<?= $disabledAttr ?>>Deduct & Save</button>
+            <button type="button" class="btn btn-secondary" id="clearSelectionBtn"<?= $disabledAttr ?>>Cancel</button>
           </div>
         </div>
       </div>
@@ -129,15 +138,20 @@
 
 <?= $this->section('scripts') ?>
 <script>
+  const distributeForm = document.querySelector('form[data-readonly]');
+  const distributeReadonly = distributeForm?.getAttribute('data-readonly') === '1';
+
   // Auto-submit filter when book changes
   document.getElementById('bookSelect')?.addEventListener('change', () => {
     document.getElementById('filterForm').submit();
   });
 
   document.getElementById('checkAllBtn')?.addEventListener('click', () => {
+    if (distributeReadonly) return;
     document.querySelectorAll('.student-box').forEach(cb => cb.checked = true);
   });
   document.getElementById('uncheckAllBtn')?.addEventListener('click', () => {
+    if (distributeReadonly) return;
     document.querySelectorAll('.student-box').forEach(cb => cb.checked = false);
   });
 </script>
@@ -149,17 +163,20 @@
   });
 
   document.getElementById('checkAllBtn')?.addEventListener('click', () => {
+    if (distributeReadonly) return;
     document.querySelectorAll('.student-box').forEach(cb => cb.checked = true);
   });
 
   document.getElementById('uncheckAllBtn')?.addEventListener('click', () => {
+    if (distributeReadonly) return;
     document.querySelectorAll('.student-box').forEach(cb => cb.checked = false);
   });
 
   // Cancel button clears all checkboxes
   document.getElementById('clearSelectionBtn')?.addEventListener('click', () => {
+    if (distributeReadonly) return;
     document.querySelectorAll('.student-box').forEach(cb => cb.checked = false);
   });
 </script>
 
-<?= $this->endSection() ?>
\ No newline at end of file
+<?= $this->endSection() ?>
diff --git a/app/Views/layout/main_layout.php b/app/Views/layout/main_layout.php
index 074988b..299054c 100644
--- a/app/Views/layout/main_layout.php
+++ b/app/Views/layout/main_layout.php
@@ -28,6 +28,7 @@
     <link rel="stylesheet" href="<?= base_url('assets/css/style.css') ?>">
     <link rel="stylesheet" href="<?= base_url('assets/css/landing_page.css?v=1.1') ?>">
     <link rel="stylesheet" href="<?= base_url('assets/css/custom.css') ?>">
+    <?= $this->renderSection('styles') ?>
 
     <?php
       // Accent + menu palettes (shared with management layout)
diff --git a/app/Views/teacher/class_view.php b/app/Views/teacher/class_view.php
index 1ae2016..84300a2 100644
--- a/app/Views/teacher/class_view.php
+++ b/app/Views/teacher/class_view.php
@@ -1,4 +1,8 @@
 <?= $this->extend('layout/main_layout') ?>
+<?= $this->section('styles') ?>
+<link rel="stylesheet" href="https://cdn.datatables.net/1.13.10/css/jquery.dataTables.min.css">
+<link rel="stylesheet" href="https://cdn.datatables.net/1.13.10/css/dataTables.bootstrap5.min.css">
+<?= $this->endSection() ?>
 <?= $this->section('content') ?>
 
 <style>
@@ -131,10 +135,6 @@
                                         </td>
                                     </tr>
                                 <?php endforeach; ?>
-                            <?php else: ?>
-                                <tr>
-                                    <td colspan="9" class="text-center">No students found in this class.</td>
-                                </tr>
                             <?php endif; ?>
                         </tbody>
                     </table>
@@ -154,17 +154,33 @@
 <?= $this->endSection() ?>
 
 <?= $this->section('scripts') ?>
+<script src="https://cdn.datatables.net/1.13.10/js/jquery.dataTables.min.js"></script>
+<script src="https://cdn.datatables.net/1.13.10/js/dataTables.bootstrap5.min.js"></script>
 <script>
     $(document).ready(function() {
+        if (!(window.jQuery && jQuery.fn && jQuery.fn.DataTable)) {
+            return;
+        }
         <?php if (!empty($classes)): ?>
             <?php foreach ($classes as $index => $class): ?>
-                $('#classTable<?= $index ?>').DataTable({
+                const table<?= $index ?> = $('#classTable<?= $index ?>');
+                const expectedColumns<?= $index ?> = table<?= $index ?>.find('thead th').length;
+                const hasInvalidRows<?= $index ?> = table<?= $index ?>.find('tbody tr').toArray().some(function(row) {
+                    return $(row).children('td, th').length !== expectedColumns<?= $index ?>;
+                });
+                if (hasInvalidRows<?= $index ?>) {
+                    return;
+                }
+                table<?= $index ?>.DataTable({
                     // Keep columns visible and avoid squeezing
                     responsive: false,      // prevent column hiding that can make table look small
                     autoWidth: true,        // let DT calculate widths, we'll still force 100% via CSS
                     scrollX: true,          // allow horizontal scroll when needed
                     pageLength: 25,
                     lengthChange: false,
+                    language: {
+                        emptyTable: 'No students found in this class.'
+                    },
                     columnDefs: [
                         { targets: '_all', className: 'text-nowrap' } // avoid wrapping labels
                     ]
diff --git a/app/Views/teacher/showupdate_attendance.php b/app/Views/teacher/showupdate_attendance.php
index 9d83451..5be1f90 100644
--- a/app/Views/teacher/showupdate_attendance.php
+++ b/app/Views/teacher/showupdate_attendance.php
@@ -1,5 +1,10 @@
 <?= $this->extend('layout/main_layout') ?>
 
+<?= $this->section('styles') ?>
+<link rel="stylesheet" href="https://cdn.datatables.net/1.13.10/css/jquery.dataTables.min.css">
+<link rel="stylesheet" href="https://cdn.datatables.net/1.13.10/css/dataTables.bootstrap5.min.css">
+<?= $this->endSection() ?>
+
 <?= $this->section('content') ?>
 <div class="container-xxl py-5">
   <div class="container">
@@ -282,6 +287,8 @@
 <?= $this->endSection() ?>
 
 <?= $this->section('scripts') ?>
+<script src="https://cdn.datatables.net/1.13.10/js/jquery.dataTables.min.js"></script>
+<script src="https://cdn.datatables.net/1.13.10/js/dataTables.bootstrap5.min.js"></script>
 <script>
 document.addEventListener("DOMContentLoaded",()=>{
   const form=document.getElementById("attendanceForm");
@@ -316,16 +323,34 @@ document.addEventListener("DOMContentLoaded",()=>{
 
 <script>
 $(function(){
-  $('#teachersTable').DataTable({
-    pageLength:100,
-    order:[],
-    columnDefs:[{targets:[0,3,4,5,6],className:'text-center'}]
-  });
-  $('#studentsTable').DataTable({
-    pageLength:100,
-    order:[],
-    columnDefs:[{targets:[0,4,5,6,7],className:'text-center'}]
-  });
+  if (!(window.jQuery && jQuery.fn && jQuery.fn.DataTable)) {
+    return;
+  }
+
+  function hasValidRows($table) {
+    const expectedColumns = $table.find('thead th').length;
+    return !$table.find('tbody tr').toArray().some(function(row) {
+      return $(row).children('td, th').length !== expectedColumns;
+    });
+  }
+
+  const $teachersTable = $('#teachersTable');
+  if ($teachersTable.length && hasValidRows($teachersTable)) {
+    $teachersTable.DataTable({
+      pageLength:100,
+      order:[],
+      columnDefs:[{targets:[0,3,4,5,6],className:'text-center'}]
+    });
+  }
+
+  const $studentsTable = $('#studentsTable');
+  if ($studentsTable.length && hasValidRows($studentsTable)) {
+    $studentsTable.DataTable({
+      pageLength:100,
+      order:[],
+      columnDefs:[{targets:[0,4,5,6,7],className:'text-center'}]
+    });
+  }
 });
 </script>
 <?= $this->endSection() ?>