diff --git a/README.md b/README.md
index 2aa7939..14ac33e 100644
--- a/README.md
+++ b/README.md
@@ -95,7 +95,7 @@ CheckMe/
 │   │
 │   └── raspi/
 │       ├── AUTOSTART_CONVERTION.md     # Run CheckMe on boot (systemd)
-│       ├── L3210_INITIAL_SETUP.md      # Epson L3210 scanner setup
+│       ├── L3210_INITIAL_SETUP.md      # Canon PIXMA MG2570S Scanner setup
 │       ├── RASPI_SYSTEM_FLOW.md        # Full system flowchart
 │       ├── SCAN_ANSWER_KEY_FLOW.md     # Answer key scanning flowchart
 │       ├── SCAN_ANSWER_SHEET_FLOW.md   # Answer sheet checking flowchart
@@ -114,7 +114,7 @@ CheckMe/
 ## Components
 
 ### Raspberry Pi Device
-The physical grading machine. Runs Python on a Raspberry Pi 4B with an I2C LCD display, a 4x3 matrix keypad, and an Epson L3210 flatbed scanner.
+The physical grading machine. Runs Python on a Raspberry Pi 4B with an I2C LCD display, a 4x3 matrix keypad, and an Canon PIXMA MG2570S scanner.
 
 See [`raspi_code/`](./raspi_code/) and [`docs/raspi/`](./docs/raspi/) for setup and documentation.
 
@@ -129,7 +129,7 @@ See [`app/CheckMe/`](./app/CheckMe/) and [`app/README.md`](./app/README.md) for
 
 | Layer | Technology |
 |---|---|
-| Hardware | Raspberry Pi 4B, Epson L3210, I2C LCD, 4x3 Keypad |
+| Hardware | Raspberry Pi 4B, Canon PIXMA MG2570S, I2C LCD, 4x3 Keypad |
 | Raspi Software | Python 3.12, Firebase Admin SDK, Gemini API, Cloudinary |
 | Mobile App | React Native (cross-platform) |
 | OCR | Google Gemini |
diff --git a/app/CheckMe/assets/checkme-logo.png b/app/CheckMe/assets/checkme-logo.png
index d6271a6..836dc13 100644
Binary files a/app/CheckMe/assets/checkme-logo.png and b/app/CheckMe/assets/checkme-logo.png differ
diff --git a/app/CheckMe/src/screens/student/DashboardScreen.tsx b/app/CheckMe/src/screens/student/DashboardScreen.tsx
index 9eaddb3..e23e1e6 100644
--- a/app/CheckMe/src/screens/student/DashboardScreen.tsx
+++ b/app/CheckMe/src/screens/student/DashboardScreen.tsx
@@ -361,7 +361,7 @@ const StudentDashboardScreen: React.FC<Props> = () => {
               start={{ x: 0, y: 0 }} end={{ x: 1, y: 0 }}
               style={styles.gradientButton}
             >
-              <Text style={styles.joinButtonText}>📚 Join Subject</Text>
+              <Text style={styles.joinButtonText}> Join Subject</Text>
             </LinearGradient>
           </TouchableOpacity>
         </View>
diff --git a/app/CheckMe/src/screens/teacher/AnswerKeysScreen.tsx b/app/CheckMe/src/screens/teacher/AnswerKeysScreen.tsx
index 905e406..af2fa4b 100644
--- a/app/CheckMe/src/screens/teacher/AnswerKeysScreen.tsx
+++ b/app/CheckMe/src/screens/teacher/AnswerKeysScreen.tsx
@@ -242,7 +242,7 @@ const AnswerKeysScreen: React.FC<Props> = ({ route }) => {
                         <Text style={styles.cardUid}>{item.assessmentUid}</Text>
                       </View>
                       <View style={styles.missingBadge}>
-                        <Text style={styles.missingBadgeText}>❌ Not Scanned</Text>
+                        <Text style={styles.missingBadgeText}> Not Scanned</Text>
                       </View>
                     </View>
                     <Text style={styles.missingHint}>
@@ -273,7 +273,7 @@ const AnswerKeysScreen: React.FC<Props> = ({ route }) => {
                     </View>
                     <View style={styles.cardHeaderRight}>
                       <View style={styles.scannedBadge}>
-                        <Text style={styles.scannedBadgeText}>✅ Scanned</Text>
+                        <Text style={styles.scannedBadgeText}>Scanned</Text>
                       </View>
                       {hasImages && (
                         <View style={styles.imageBadge}>
@@ -290,7 +290,7 @@ const AnswerKeysScreen: React.FC<Props> = ({ route }) => {
                       {/* Scanned Images */}
                       {hasImages && (
                         <View style={styles.imagesSection}>
-                          <Text style={styles.imagesSectionTitle}>📄 Scanned Answer Key Images</Text>
+                          <Text style={styles.imagesSectionTitle}> Scanned Answer Key Images</Text>
                           <ScrollView
                             horizontal
                             showsHorizontalScrollIndicator={false}
@@ -310,7 +310,7 @@ const AnswerKeysScreen: React.FC<Props> = ({ route }) => {
                                 />
                                 <View style={styles.imageThumbnailOverlay}>
                                   <Text style={styles.imageThumbnailLabel}>Page {index + 1}</Text>
-                                  <Text style={styles.imageThumbnailZoom}>🔍</Text>
+                                  <Text style={styles.imageThumbnailZoom}></Text>
                                 </View>
                               </TouchableOpacity>
                             ))}
diff --git a/app/CheckMe/src/screens/teacher/AssessmentScoreTableScreen.tsx b/app/CheckMe/src/screens/teacher/AssessmentScoreTableScreen.tsx
index dbcde5a..9e65cc7 100644
--- a/app/CheckMe/src/screens/teacher/AssessmentScoreTableScreen.tsx
+++ b/app/CheckMe/src/screens/teacher/AssessmentScoreTableScreen.tsx
@@ -145,7 +145,7 @@ const AssessmentScoreTableScreen: React.FC<Props> = ({ route, navigation }) => {
       msg += `${dirtyRows.length} answer${dirtyRows.length > 1 ? 's' : ''} edited.\n`;
     }
     msg += `New score: ${liveScore} / ${liveTotal} (${livePct}%)\n`;
-    msg += `Status: ${isFinal ? '✅ Final' : '⏳ Pending'}`;
+    msg += `Status: ${isFinal ? ' Final' : ' Pending'}`;
 
     if (isFinal && hasPendingRow) {
       msg += `\n\n⚠️ Some questions are still pending (essay). Marking as Final anyway — you can change this later.`;
@@ -180,7 +180,7 @@ const AssessmentScoreTableScreen: React.FC<Props> = ({ route, navigation }) => {
             Alert.alert(
               'Saved',
               `Score: ${liveScore} / ${liveTotal} (${livePct}%)\n` +
-              `Status: ${isFinal ? 'Final ✅' : 'Pending ⏳'}`
+              `Status: ${isFinal ? 'Final ' : 'Pending '}`
             );
           } catch (error: any) {
             Alert.alert('Error', error.message || 'Failed to save changes');
@@ -257,7 +257,7 @@ const AssessmentScoreTableScreen: React.FC<Props> = ({ route, navigation }) => {
           <View style={styles.finalToggleRow}>
             <View style={styles.finalToggleLeft}>
               <Text style={styles.finalToggleLabel}>
-                {isFinal ? '✅ Final Score' : '⏳ Pending'}
+                {isFinal ? ' Final Score' : ' Pending'}
               </Text>
               <Text style={styles.finalToggleSub}>
                 {isFinal
@@ -314,7 +314,7 @@ const AssessmentScoreTableScreen: React.FC<Props> = ({ route, navigation }) => {
 
         {/* ── Breakdown table ──────────────────── */}
         <View style={styles.breakdownSection}>
-          <Text style={styles.sectionTitle}>📝 Question Breakdown</Text>
+          <Text style={styles.sectionTitle}> Question Breakdown</Text>
 
           <View style={styles.tableHeader}>
             <Text style={[styles.thCell, styles.colQ]}>Q</Text>
@@ -391,7 +391,7 @@ const AssessmentScoreTableScreen: React.FC<Props> = ({ route, navigation }) => {
                         style={[styles.essayBtn, row.editedResult === 'pending' && styles.essayBtnActivePending]}
                         onPress={() => updateRow(index, 'editedResult', 'pending')}
                       >
-                        <Text style={styles.essayBtnText}>⏳</Text>
+                        <Text style={styles.essayBtnText}></Text>
                       </TouchableOpacity>
                     </View>
                   ) : (
@@ -443,7 +443,7 @@ const AssessmentScoreTableScreen: React.FC<Props> = ({ route, navigation }) => {
             <Text style={styles.saveBarScore}>{liveScore} / {liveTotal}</Text>
             <Text style={styles.saveBarChanges}>
               {rows.filter(r => r.isDirty).length} change{rows.filter(r => r.isDirty).length !== 1 ? 's' : ''}
-              {' '}· {isFinal ? '✅ Final' : '⏳ Pending'}
+              {' '}· {isFinal ? ' Final' : ' Pending'}
             </Text>
           </View>
           <TouchableOpacity
diff --git a/app/CheckMe/src/screens/teacher/DashboardScreen.tsx b/app/CheckMe/src/screens/teacher/DashboardScreen.tsx
index 782431a..7660a84 100644
--- a/app/CheckMe/src/screens/teacher/DashboardScreen.tsx
+++ b/app/CheckMe/src/screens/teacher/DashboardScreen.tsx
@@ -375,7 +375,7 @@ const DashboardScreen: React.FC<Props> = ({ navigation }) => {
               style={styles.generateCodeButton}
               onPress={handleOpenCodeModal}
             >
-              <Text style={styles.generateCodeButtonText}>🔑 Raspi Login</Text>
+              <Text style={styles.generateCodeButtonText}> Raspi Login</Text>
             </TouchableOpacity>
 
             <TouchableOpacity style={styles.signOutButton} onPress={handleSignOut}>
@@ -429,7 +429,7 @@ const DashboardScreen: React.FC<Props> = ({ navigation }) => {
                       }}
                       disabled={actionLoading}
                     >
-                      <Text style={styles.detailIconText}>ℹ️</Text>
+                      <Text style={styles.detailIconText}>🛈</Text>
                     </TouchableOpacity>
                   </View>
                 </TouchableOpacity>
@@ -440,7 +440,7 @@ const DashboardScreen: React.FC<Props> = ({ navigation }) => {
                     onPress={() => handleEditSection(section)}
                     disabled={actionLoading}
                   >
-                    <Text style={styles.iconActionText}>✏️</Text>
+                    <Text style={styles.iconActionText}>🖊</Text>
                   </TouchableOpacity>
                   <View style={styles.iconActionDivider} />
                   <TouchableOpacity
@@ -513,7 +513,7 @@ const DashboardScreen: React.FC<Props> = ({ navigation }) => {
                       onPress={handleCopyCode}
                       disabled={codeSecondsLeft === 0}
                     >
-                      <Text style={styles.copyCodeButtonText}>📋 Copy Code</Text>
+                      <Text style={styles.copyCodeButtonText}> Copy Code</Text>
                     </TouchableOpacity>
 
                     <TouchableOpacity
@@ -545,7 +545,7 @@ const DashboardScreen: React.FC<Props> = ({ navigation }) => {
                     {codeGenerating ? (
                       <ActivityIndicator color="#ffffff" />
                     ) : (
-                      <Text style={styles.generateButtonText}>🔑 Generate Code</Text>
+                      <Text style={styles.generateButtonText}> Generate Code</Text>
                     )}
                   </LinearGradient>
                 </TouchableOpacity>
@@ -581,7 +581,7 @@ const DashboardScreen: React.FC<Props> = ({ navigation }) => {
                     <TouchableOpacity style={[styles.iconButton, styles.saveButton]} onPress={handleSaveProfile} disabled={actionLoading}>
                       {actionLoading
                         ? <ActivityIndicator size="small" color="#ffffff" />
-                        : <Text style={[styles.iconButtonText, styles.saveButtonText]}>✓ Save</Text>
+                        : <Text style={[styles.iconButtonText, styles.saveButtonText]}> Save</Text>
                       }
                     </TouchableOpacity>
                     <TouchableOpacity style={styles.iconButton} onPress={() => setIsEditing(false)} disabled={actionLoading}>
@@ -772,7 +772,7 @@ const DashboardScreen: React.FC<Props> = ({ navigation }) => {
                     style={styles.copyButton}
                     onPress={() => handleCopyToClipboard(selectedSectionForDetails?.id || '', 'Section ID')}
                   >
-                    <Text style={styles.copyButtonText}>📋 Copy</Text>
+                    <Text style={styles.copyButtonText}>Copy</Text>
                   </TouchableOpacity>
                 </View>
               </View>
@@ -786,7 +786,7 @@ const DashboardScreen: React.FC<Props> = ({ navigation }) => {
                     style={styles.copyButton}
                     onPress={() => handleCopyToClipboard(selectedSectionForDetails?.teacherId || '', 'Teacher ID')}
                   >
-                    <Text style={styles.copyButtonText}>📋 Copy</Text>
+                    <Text style={styles.copyButtonText}>Copy</Text>
                   </TouchableOpacity>
                 </View>
               </View>
diff --git a/app/CheckMe/src/screens/teacher/SectionDashboardScreen.tsx b/app/CheckMe/src/screens/teacher/SectionDashboardScreen.tsx
index e85d1f7..c5fce79 100644
--- a/app/CheckMe/src/screens/teacher/SectionDashboardScreen.tsx
+++ b/app/CheckMe/src/screens/teacher/SectionDashboardScreen.tsx
@@ -262,7 +262,7 @@ const SectionDashboardScreen: React.FC<Props> = ({ route, navigation }) => {
                       }}
                       disabled={actionLoading}
                     >
-                      <Text style={styles.detailIconText}>ℹ️</Text>
+                      <Text style={styles.detailIconText}>🛈</Text>
                     </TouchableOpacity>
                   </View>
                 </TouchableOpacity>
@@ -406,7 +406,7 @@ const SectionDashboardScreen: React.FC<Props> = ({ route, navigation }) => {
                   <View style={styles.uidContainer}>
                     <Text style={[styles.modalValue, styles.monoValue]}>{row.val}</Text>
                     <TouchableOpacity style={styles.copyButton} onPress={() => handleCopyToClipboard(row.val || '', row.label)}>
-                      <Text style={styles.copyButtonText}>📋 Copy</Text>
+                      <Text style={styles.copyButtonText}>Copy</Text>
                     </TouchableOpacity>
                   </View>
                 </View>
diff --git a/app/CheckMe/src/screens/teacher/SubjectDashboardScreen.tsx b/app/CheckMe/src/screens/teacher/SubjectDashboardScreen.tsx
index def1ffa..3f8f723 100644
--- a/app/CheckMe/src/screens/teacher/SubjectDashboardScreen.tsx
+++ b/app/CheckMe/src/screens/teacher/SubjectDashboardScreen.tsx
@@ -78,7 +78,7 @@ const SubjectDashboardScreen: React.FC<Props> = ({ route, navigation }) => {
       const sorted = result.sort((a, b) => b.createdAt - a.createdAt);
       setAssessments(sorted);
     } catch (error: any) {
-      console.error('❌ [SubjectDashboard] Error loading assessments:', error);
+      console.error(' [SubjectDashboard] Error loading assessments:', error);
       setAssessments([]);
     }
   };
@@ -102,7 +102,7 @@ const SubjectDashboardScreen: React.FC<Props> = ({ route, navigation }) => {
       const code = await getSubjectInviteCode(user.uid, subject.id);
       setInviteCode(code);
     } catch (error: any) {
-      console.error('❌ Error loading invite code:', error);
+      console.error(' Error loading invite code:', error);
     }
   };
 
@@ -329,7 +329,7 @@ const SubjectDashboardScreen: React.FC<Props> = ({ route, navigation }) => {
             <TouchableOpacity style={styles.inviteCodeContainer} onPress={handleCopyInviteCode}>
               <Text style={styles.inviteCodeLabel}>Invite Code:</Text>
               <Text style={styles.inviteCodeText}>{inviteCode}</Text>
-              <Text style={styles.copyIcon}>📋</Text>
+              <Text style={styles.copyIcon}></Text>
             </TouchableOpacity>
           )}
         </View>
@@ -347,7 +347,7 @@ const SubjectDashboardScreen: React.FC<Props> = ({ route, navigation }) => {
               end={{ x: 1, y: 0 }}
               style={styles.gradientButton}
             >
-              <Text style={styles.actionButtonText}>📝 Create Assessment</Text>
+              <Text style={styles.actionButtonText}> Create Assessment</Text>
             </LinearGradient>
           </TouchableOpacity>
         </View>
@@ -358,18 +358,18 @@ const SubjectDashboardScreen: React.FC<Props> = ({ route, navigation }) => {
             <Text style={styles.sectionTitle}>Assessments</Text>
             <View style={styles.headerButtonsContainer}>
               <TouchableOpacity style={styles.answerKeysHeaderButton} onPress={handleViewAnswerKeys} disabled={actionLoading}>
-                <Text style={styles.answerKeysHeaderButtonText}>🗝️ Answer Keys</Text>
+                <Text style={styles.answerKeysHeaderButtonText}> Answer Keys</Text>
               </TouchableOpacity>
               {pendingEnrollments.length > 0 && (
                 <TouchableOpacity onPress={handleViewPendingEnrollments}>
                   <Text style={[styles.sectionTitle, styles.clickableTitle, styles.pendingBadge]}>
-                    Pending ({pendingEnrollments.length}) 🔔
+                    Pending ({pendingEnrollments.length}) 
                   </Text>
                 </TouchableOpacity>
               )}
               <TouchableOpacity onPress={handleViewEnrolledStudents}>
                 <Text style={[styles.sectionTitle, styles.clickableTitle]}>
-                  Enrolled ({approvedEnrollments.length}) 👁️
+                  Enrolled ({approvedEnrollments.length}) 
                 </Text>
               </TouchableOpacity>
             </View>
@@ -554,7 +554,7 @@ const SubjectDashboardScreen: React.FC<Props> = ({ route, navigation }) => {
                       onPress={() => setIsEditingEnrollments(!isEditingEnrollments)}
                     >
                       <Text style={styles.editButtonText}>
-                        {isEditingEnrollments ? '✓ Done' : '✏️ Edit'}
+                        {isEditingEnrollments ? ' Done' : ' Edit'}
                       </Text>
                     </TouchableOpacity>
                   )}
@@ -590,7 +590,7 @@ const SubjectDashboardScreen: React.FC<Props> = ({ route, navigation }) => {
               <View style={styles.modalBody}>
                 {pendingEnrollments.length === 0 ? (
                   <View style={styles.emptyState}>
-                    <Text style={styles.emptyStateIcon}>✅</Text>
+                    <Text style={styles.emptyStateIcon}></Text>
                     <Text style={styles.emptyStateText}>No pending requests</Text>
                   </View>
                 ) : (
@@ -609,14 +609,14 @@ const SubjectDashboardScreen: React.FC<Props> = ({ route, navigation }) => {
                           onPress={() => handleApproveEnrollment(enrollment)}
                           disabled={actionLoading}
                         >
-                          <Text style={styles.approveButtonText}>✓ Approve</Text>
+                          <Text style={styles.approveButtonText}> Approve</Text>
                         </TouchableOpacity>
                         <TouchableOpacity
                           style={styles.rejectButton}
                           onPress={() => handleRejectEnrollment(enrollment)}
                           disabled={actionLoading}
                         >
-                          <Text style={styles.rejectButtonText}>✕ Reject</Text>
+                          <Text style={styles.rejectButtonText}> Reject</Text>
                         </TouchableOpacity>
                       </View>
                     </View>
diff --git a/app/CheckMe/src/screens/teacher/ViewScoresScreen.tsx b/app/CheckMe/src/screens/teacher/ViewScoresScreen.tsx
index 0ec4e3b..690e90a 100644
--- a/app/CheckMe/src/screens/teacher/ViewScoresScreen.tsx
+++ b/app/CheckMe/src/screens/teacher/ViewScoresScreen.tsx
@@ -347,7 +347,7 @@ const ViewScoresScreen: React.FC<Props> = ({ route, navigation }) => {
                         </>
                       ) : (
                         <View style={styles.pendingBadge}>
-                          <Text style={styles.pendingText}>⏳ Pending</Text>
+                          <Text style={styles.pendingText}> Pending</Text>
                         </View>
                       )}
                     </View>
@@ -396,7 +396,7 @@ const ViewScoresScreen: React.FC<Props> = ({ route, navigation }) => {
         {notScanned.length > 0 && (
           <View style={styles.notScannedSection}>
             <View style={styles.notScannedHeader}>
-              <Text style={styles.notScannedTitle}>⏳ Not Yet Scanned</Text>
+              <Text style={styles.notScannedTitle}> Not Yet Scanned</Text>
               <View style={styles.notScannedCount}>
                 <Text style={styles.notScannedCountText}>{notScanned.length}</Text>
               </View>
diff --git a/raspi_code/README.md b/raspi_code/README.md
index 4a07b32..1daf9bc 100644
--- a/raspi_code/README.md
+++ b/raspi_code/README.md
@@ -43,7 +43,7 @@ CheckMe is an automated grading system that runs on a Raspberry Pi. It uses a fl
 | Raspberry Pi | Raspberry Pi 4B |
 | LCD Display | I2C LCD — 16x2 or 20x4 |
 | Keypad | 4x3 Matrix Keypad |
-| Scanner | Epson L3210 |
+| Scanner | Canon PIXMA MG2570S Scanner |
 
 ---
 
@@ -100,7 +100,7 @@ raspi_code/
 │   ├── auth.py                     # Teacher authentication
 │   ├── lcd_hardware.py             # LCD I2C driver
 │   ├── keypad_hardware.py          # 4x3 Keypad driver
-│   ├── l3210_scanner_hardware.py   # Epson L3210 scanner interface
+│   ├── l3210_scanner_hardware.py   # Canon PIXMA MG2570S Scanner interface
 │   ├── firebase_rtdb_client.py     # Firebase RTDB (Admin SDK)
 │   ├── cloudinary_client.py        # Cloudinary image uploader
 │   ├── gemini_client.py            # Gemini OCR client
@@ -117,7 +117,7 @@ raspi_code/
 │   └── answer_sheets/              # Scanned student sheet images
 └── docs/
     └── raspi/
-        └── RASPI_L3210_SETUP.md    # Scanner setup guide
+        └── RASPI_MG2570S_SETUP.md    # Scanner setup guide
 ```
 
 ---
@@ -126,7 +126,7 @@ raspi_code/
 
 - **Python:** 3.12 or above
 - **OS:** Raspberry Pi OS Desktop (Bookworm recommended)
-- **System packages:** See `requirements.txt` and `docs/raspi/RASPI_L3210_SETUP.md`
+- **System packages:** See `requirements.txt` and `docs/raspi/RASPI_MG2570S_SETUP.md`
 
 Enable I2C on your Raspberry Pi:
 ```bash
@@ -159,7 +159,7 @@ pip install -r requirements.txt
 
 Follow the full scanner setup guide:
 ```
-docs/raspi/RASPI_L3210_SETUP.md
+docs/raspi/RASPI_MG2570S__SETUP.md
 ```
 
 **5. Set up Firebase credentials**
@@ -289,7 +289,7 @@ Scoring features:
 | `auth.py` | Manages `cred.txt` session, validates 8-digit temp codes via Firebase |
 | `lcd_hardware.py` | I2C LCD driver with scrollable menus, multi-line display |
 | `keypad_hardware.py` | 4x3 matrix keypad GPIO driver with debounce |
-| `l3210_scanner_hardware.py` | Epson L3210 scanner interface via SANE |
+| `l3210_scanner_hardware.py` | Canon PIXMA MG2570S Scanner interface via SANE |
 | `firebase_rtdb_client.py` | Firebase Admin SDK RTDB client (answer keys, student results, temp codes) |
 | `cloudinary_client.py` | Single and batch image upload, delete |
 | `gemini_client.py` | Gemini OCR with retry logic |
@@ -304,10 +304,10 @@ Scoring features:
 
 ## Scanner Setup
 
-Full Epson L3210 setup instructions (SANE driver, permissions, testing):
+Full Canon PIXMA MG2570S Scanner setup instructions (SANE driver, permissions, testing):
 
 ```
-docs/raspi/RASPI_L3210_SETUP.md
+docs/raspi/RASPI_MG2570S_SETUP.md
 ```
 
 ---