diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 7d844b2..e4cacd5 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -4,7 +4,7 @@
     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
     <uses-permission android:name="android.permission.BLUETOOTH" />
     <uses-permission android:name="android.permission.INTERNET"/>
-
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 
     <application
         android:allowBackup="true"
diff --git a/app/src/main/java/massiveattendancescannerapplication/CourseActivity.java b/app/src/main/java/massiveattendancescannerapplication/CourseActivity.java
index b3e68f3..a1292dc 100644
--- a/app/src/main/java/massiveattendancescannerapplication/CourseActivity.java
+++ b/app/src/main/java/massiveattendancescannerapplication/CourseActivity.java
@@ -17,6 +17,8 @@ import android.widget.ListAdapter;
 import android.widget.ListView;
 import android.widget.SimpleAdapter;
 import android.widget.TextView;
+
+import massiveattendancescannerapplication.Services.FileReader;
 import massiveattendancescannerapplication.Services.ServiceHandler;
 
 public class CourseActivity extends ListActivity {
@@ -27,7 +29,7 @@ public class CourseActivity extends ListActivity {
     JSONObject professor;
     String JSONString;
     private static final String COURSE = "courses";
-    private static final String URL = "http://192.168.0.106:3000/professors/56f5fd3a20047f3c15b05f0e";
+    String URL;
     private static final String TAG_ID = "_id";
     private static final String TAG_NAME = "name";
     private static final String TAG_CODE = "code";
@@ -38,7 +40,7 @@ public class CourseActivity extends ListActivity {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.course_activity);
 
-
+        URL = FileReader.getUrl(getApplicationContext());
         courseList = new ArrayList<>();
         new LoadCourses().execute();
 
diff --git a/app/src/main/java/massiveattendancescannerapplication/SectionActivity.java b/app/src/main/java/massiveattendancescannerapplication/SectionActivity.java
index e51864f..ee45a4e 100644
--- a/app/src/main/java/massiveattendancescannerapplication/SectionActivity.java
+++ b/app/src/main/java/massiveattendancescannerapplication/SectionActivity.java
@@ -17,6 +17,8 @@ import android.widget.ListAdapter;
 import android.widget.ListView;
 import android.widget.SimpleAdapter;
 import android.widget.TextView;
+
+import massiveattendancescannerapplication.Services.FileReader;
 import massiveattendancescannerapplication.Services.ServiceHandler;
 
 public class SectionActivity extends ListActivity {
@@ -28,7 +30,7 @@ public class SectionActivity extends ListActivity {
     String JSONString, course_id, course_name;
     private static final String COURSE = "courses";
     private static final String SECTION = "sections";
-    private static final String URL = "http://192.168.0.106:3000/professors/56f5fd3a20047f3c15b05f0e";
+    String URL;
     private static final String TAG_ID = "_id";
     private static final String TAG_NAME = "name";
     private static final String TAG_SEMESTER = "semester";
@@ -40,6 +42,7 @@ public class SectionActivity extends ListActivity {
         setContentView(R.layout.section_activity);
 
         Intent i = getIntent();
+        URL = FileReader.getUrl(getApplicationContext());
         course_id = i.getStringExtra("course_id");
         sectionList = new ArrayList<HashMap<String, String>>();
         new LoadSections().execute();
diff --git a/app/src/main/java/massiveattendancescannerapplication/Services/FileReader.java b/app/src/main/java/massiveattendancescannerapplication/Services/FileReader.java
index 2a032f3..a7a440c 100644
--- a/app/src/main/java/massiveattendancescannerapplication/Services/FileReader.java
+++ b/app/src/main/java/massiveattendancescannerapplication/Services/FileReader.java
@@ -19,22 +19,18 @@ import java.io.IOException;
 public class FileReader {
 
     static String response;
-    private static final String professors = "professors.txt";
-    private static final String courses = "courses.txt";
-    private static final String sections = "sections.txt";
-    private static final String students = "students.txt";
+    private static final String url = "url.txt";
 
     /**
      * <p>
      *     This function returns the URL direction parsed from the .txt file contained in the phone.
      * </p>
      * @param context Application Context.
-     * @param method Method representing POST of GET methods.
      * @return String containing the URL.
      */
-    public static String getUrl(Context context, int method) {
+    public static String getUrl(Context context) {
         try {
-            return parse(getConfigFile(context,method));
+            return parse(getConfigFile(context));
         } catch (IOException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
@@ -48,25 +44,18 @@ public class FileReader {
      *     direction for each type.
      * </p>
      * @param context Application Context.
-     * @param method Method representing POST of GET methods.
      * @return BufferedReader containing the information inside the file.
      */
-    private static BufferedReader getConfigFile(Context context,int method) {
+    private static BufferedReader getConfigFile(Context context) {
         if(isExternalStorageReadable()){
             // Get the directory for the app's private files
-            File file = null;
+            String extr = Environment.getExternalStorageDirectory().toString();
+            File mFolder = new File(extr + "/data");
+            File file;
             try {
-                if(method == 1) file = new File(context.getExternalFilesDir(null), professors);
-                if(method == 2) file = new File(context.getExternalFilesDir(null), courses);
-                if(method == 3) file = new File(context.getExternalFilesDir(null), sections);
-                if(method == 4) file = new File(context.getExternalFilesDir(null), students);
-
-                if (file!=null) {
-                    java.io.FileReader fr = new java.io.FileReader(file);
-                    return new BufferedReader(fr);
-                }else{
-                    return null;
-                }
+                file = new File(mFolder.getAbsolutePath(), url);
+                java.io.FileReader fr = new java.io.FileReader(file);
+                return new BufferedReader(fr);
 
             } catch (FileNotFoundException e) {
                 // TODO Auto-generated catch block
diff --git a/app/src/main/java/massiveattendancescannerapplication/Services/TransmitterTask.java b/app/src/main/java/massiveattendancescannerapplication/Services/TransmitterTask.java
index 09cd35d..fc9518a 100644
--- a/app/src/main/java/massiveattendancescannerapplication/Services/TransmitterTask.java
+++ b/app/src/main/java/massiveattendancescannerapplication/Services/TransmitterTask.java
@@ -19,12 +19,12 @@ import android.os.Handler;
 
 public class TransmitterTask extends AsyncTask<JSONObject, Void, Void> {
 
-    private static final String URL = "http://192.168.0.106:3000/professors/56f5fd3a20047f3c15b05f0e";
+    String URL;
     boolean result;
 
     final  Handler myHandler = new Handler();
-    public TransmitterTask() {
-
+    public TransmitterTask(String URL) {
+        this.URL = URL;
     }
 
     protected Void doInBackground(JSONObject... professor) {
diff --git a/app/src/main/java/massiveattendancescannerapplication/StudentActivity.java b/app/src/main/java/massiveattendancescannerapplication/StudentActivity.java
index eaa6346..f85a28d 100644
--- a/app/src/main/java/massiveattendancescannerapplication/StudentActivity.java
+++ b/app/src/main/java/massiveattendancescannerapplication/StudentActivity.java
@@ -9,17 +9,24 @@ import java.util.HashMap;
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
+
+import android.app.AlertDialog;
 import android.app.ListActivity;
 import android.app.ProgressDialog;
 import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothDevice;
 import android.content.BroadcastReceiver;
 import android.content.Context;
+import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.database.Cursor;
+import android.graphics.Color;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
 import android.widget.Button;
 import android.widget.ListAdapter;
@@ -28,6 +35,7 @@ import android.widget.SimpleAdapter;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import massiveattendancescannerapplication.Services.FileReader;
 import massiveattendancescannerapplication.Services.ServiceHandler;
 import massiveattendancescannerapplication.Services.TransmitterTask;
 
@@ -42,7 +50,7 @@ public class StudentActivity extends ListActivity {
     private static final String COURSE = "courses";
     private static final String SECTION = "sections";
     private static final String STUDENT = "students";
-    private static final String URL = "http://192.168.0.106:3000/professors/56f5fd3a20047f3c15b05f0e";
+    String URL;
     private static final String TAG_ID = "_id";
     private static final String TAG_NO = "id";
     private static final String TAG_NAME = "name";
@@ -58,12 +66,55 @@ public class StudentActivity extends ListActivity {
     TransmitterTask transmitterTask;
     ArrayAdapter<String> btArrayAdapter;
     int assist = 0;
+    boolean flag = false;
 
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.student_activity);
+
         Intent i = getIntent();
+        URL = FileReader.getUrl(getApplicationContext());
+        ListView lv = getListView();
+
+        lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
+            @Override
+            public void onItemClick(AdapterView<?> parent, View view,
+                                    int position, long rowId) {
+                AlertDialog.Builder adb = new AlertDialog.Builder(
+                        StudentActivity.this);
+                HashMap<String,String> map =(HashMap<String,String>) parent.getItemAtPosition(position);
+                String name = map.get("name");
+                String lastname = map.get("lastname");
+                final int index = Integer.parseInt(map.get("_id"));
+                adb.setTitle("Asistencia Manual");
+                adb.setMessage("¿Desea poner manualmente la asistencia del alumno "+lastname+", "+name+" ?"
+                        );
+                adb.setPositiveButton("Si", new DialogInterface.OnClickListener() {
+                    public void onClick(DialogInterface dialog, int which) {
+                        try {
+                            JSONObject st = students.getJSONObject(index);
+                            JSONArray assistance = st.getJSONArray("assistanceTotal");
+                            assist = st.optInt("assistance");
+                            st.put("assistance", assist+1);
+                            JSONObject dayAssistance = new JSONObject();
+                            dayAssistance.put("day", currentDate);
+                            dayAssistance.put("assistance", true);
+                            assistance.put(dayAssistance);
+                            TextView t = (TextView) findViewById(R.id.student_name);
+                            t.setTextColor(Color.GREEN);
+                            TextView z = (TextView) findViewById(R.id.student_lastname);
+                            z.setTextColor(Color.GREEN);
+                        } catch (JSONException e) {
+                            e.printStackTrace();
+                        }
+
+                    }
+                });
+                adb.setNegativeButton("No", null);
+                adb.show();
+            }
+        });
 
         stateBluetooth = (TextView)findViewById(R.id.bluetoothstate);
         bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
@@ -176,9 +227,24 @@ public class StudentActivity extends ListActivity {
                             StudentActivity.this, studentList,
                             R.layout.list_item_students, new String[]{"section_id", TAG_ID, TAG_NO,
                             TAG_NAME, TAG_LASTNAME}, new int[]{
-                            R.id.section_id, R.id.student_id, R.id.student_no, R.id.student_name, R.id.student_lastname});
-                    setListAdapter(adapter);
+                            R.id.section_id, R.id.student_id, R.id.student_no, R.id.student_name, R.id.student_lastname})
+/*                    {
+                        @Override
+                        public View getView(int position, View convertView, ViewGroup parent) {
+                            // Get the Item from ListView
+                            View view = super.getView(position, convertView, parent);
 
+                            // Initialize a TextView for ListView each Item
+                            TextView tv = (TextView) view.findViewById(android.R.id.text1);
+
+                            // Set the text color of TextView (ListView Item)
+                            tv.setTextColor(Color.RED);
+
+                            // Generate ListView Item using TextView
+                            return view;
+                        }
+                    }*/;
+                    setListAdapter(adapter);
                     setTitle(section_name);
                 }
             });
@@ -187,19 +253,19 @@ public class StudentActivity extends ListActivity {
 
     private void CheckBlueToothState(){
         if (bluetoothAdapter == null){
-            stateBluetooth.setText("Bluetooth NOT supported");
+            stateBluetooth.setText("Bluetooth NO soportado");
         }else{
             if (bluetoothAdapter.isEnabled()){
                 if(bluetoothAdapter.isDiscovering()){
-                    stateBluetooth.setText("Bluetooth is currently in device discovery process.");
+                    stateBluetooth.setText("Bluetooth esta en modo de Descubrimiento.");
                     btnScanDevice.setEnabled(false);
 
                 }else{
-                    stateBluetooth.setText("Bluetooth is Enabled.");
+                    stateBluetooth.setText("Bluetooth esta Activado.");
                     btnScanDevice.setEnabled(true);
                 }
             }else{
-                stateBluetooth.setText("Bluetooth is NOT Enabled!");
+                stateBluetooth.setText("Bluetooth NO esta Activado!!");
                 Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                 startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
             }
@@ -212,6 +278,7 @@ public class StudentActivity extends ListActivity {
         public void onClick(View arg0) {
             btArrayAdapter.clear();
             bluetoothAdapter.startDiscovery();
+            CheckBlueToothState();
         }};
 
     private Button.OnClickListener btnEndClassOnClickListener
@@ -219,39 +286,50 @@ public class StudentActivity extends ListActivity {
 
         @Override
         public void onClick(View arg0) {
-            try {
-                for (int x = 0; x < students.length(); x++) {
-                    JSONObject st;
-                    boolean scanned = false;
-                    st = students.getJSONObject(x);
-                    JSONArray assistance;
-                    assistance = st.getJSONArray("assistanceTotal");
-                    assert assistance != null;
-                    currentDate = SDF.format(new Date());
-                    for(int g=0; g<assistance.length(); g++) {
-                        JSONObject cons = assistance.getJSONObject(g);
-                        String consDay = cons.getString("day");
-                        if (consDay.equals(currentDate)){
-                            scanned = true;
+            if (flag) {
+                try {
+                    for (int x = 0; x < students.length(); x++) {
+                        JSONObject st;
+                        boolean scanned = false;
+                        st = students.getJSONObject(x);
+                        JSONArray assistance;
+                        assistance = st.getJSONArray("assistanceTotal");
+                        assert assistance != null;
+                        currentDate = SDF.format(new Date());
+                        for (int g = 0; g < assistance.length(); g++) {
+                            JSONObject cons = assistance.getJSONObject(g);
+                            String consDay = cons.getString("day");
+                            if (consDay.equals(currentDate)) {
+                                scanned = true;
+                            }
+                        }
+                        if (!scanned) {
+                            assist = st.optInt("assistance");
+                            st.put("assistance", assist + 1);
+                            JSONObject dayAssistance = new JSONObject();
+                            dayAssistance.put("day", currentDate);
+                            dayAssistance.put("assistance", false);
+                            assistance.put(dayAssistance);
+
                         }
                     }
-                    if(!scanned){
-                        assist = st.optInt("assistance");
-                        st.put("assistance", assist+1);
-                        JSONObject dayAssistance = new JSONObject();
-                        dayAssistance.put("day", currentDate);
-                        dayAssistance.put("assistance", false);
-                        assistance.put(dayAssistance);
-                    }
+                } catch (JSONException e) {
+                    e.printStackTrace();
                 }
-            } catch (JSONException e) {
-                e.printStackTrace();
-            }
 
-            transmitterTask = new TransmitterTask();
-            transmitterTask.execute(professor);
-            finish();
-        }};
+                transmitterTask = new TransmitterTask(URL);
+                transmitterTask.execute(professor);
+                finish();
+            } else {
+                AlertDialog.Builder adb = new AlertDialog.Builder(
+                        StudentActivity.this);
+                adb.setTitle("Culminación de Escaneo");
+                adb.setMessage("Recuerde que debe escanear al menos una vez a los alumnos");
+                adb.setPositiveButton("OK", null);
+                adb.show();
+            }
+        }
+    };
 
     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
@@ -264,6 +342,7 @@ public class StudentActivity extends ListActivity {
         @Override
         public void onReceive(Context context, Intent intent) {
             String action = intent.getAction();
+            flag = true;
             if(BluetoothDevice.ACTION_FOUND.equals(action)) {
                 boolean scanned = false;
                 BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
@@ -304,6 +383,10 @@ public class StudentActivity extends ListActivity {
                                     dayAssistance.put("day", currentDate);
                                     dayAssistance.put("assistance", true);
                                     assistance.put(dayAssistance);
+                                    TextView t = (TextView) findViewById(R.id.student_name);
+                                    t.setTextColor(Color.GREEN);
+                                    TextView z = (TextView) findViewById(R.id.student_lastname);
+                                    z.setTextColor(Color.GREEN);
                                     }
                             }catch (JSONException e) {
                                 e.printStackTrace();
@@ -342,6 +425,10 @@ public class StudentActivity extends ListActivity {
                                     dayAssistance.put("day", currentDate);
                                     dayAssistance.put("assistance", true);
                                     assistance.put(dayAssistance);
+                                    TextView t = (TextView) findViewById(R.id.student_name);
+                                    t.setTextColor(Color.GREEN);
+                                    TextView z = (TextView) findViewById(R.id.student_lastname);
+                                    z.setTextColor(Color.GREEN);
                                 }
                             }catch (JSONException e) {
                                 e.printStackTrace();
@@ -350,6 +437,7 @@ public class StudentActivity extends ListActivity {
                     }
                 }
                 btArrayAdapter.add(device.getName() + "\n" + device.getAddress());
+                CheckBlueToothState();
                 btArrayAdapter.notifyDataSetChanged();
             }
         }
diff --git a/app/src/main/res/layout/course_activity.xml b/app/src/main/res/layout/course_activity.xml
index e8aeb97..2fccc03 100644
--- a/app/src/main/res/layout/course_activity.xml
+++ b/app/src/main/res/layout/course_activity.xml
@@ -5,12 +5,20 @@
     android:orientation="vertical"
     android:background="#ffffff">
 
+    <TextView
+        android:text="@string/course_intro"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:id="@+id/textView" />
+
     <ListView
         android:id="@android:id/list"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:divider="#b5b5b5"
         android:dividerHeight="1dp"
+        android:background="#f5f5dc"
         android:cacheColorHint="#00000000"/>
 
 </LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/section_activity.xml b/app/src/main/res/layout/section_activity.xml
index e8aeb97..cd9a82b 100644
--- a/app/src/main/res/layout/section_activity.xml
+++ b/app/src/main/res/layout/section_activity.xml
@@ -5,12 +5,20 @@
     android:orientation="vertical"
     android:background="#ffffff">
 
+    <TextView
+        android:text="@string/section_intro"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:id="@+id/textView" />
+
     <ListView
         android:id="@android:id/list"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:divider="#b5b5b5"
         android:dividerHeight="1dp"
+        android:background="#f5f5dc"
         android:cacheColorHint="#00000000"/>
 
 </LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/student_activity.xml b/app/src/main/res/layout/student_activity.xml
index a9e646c..5cea3f0 100644
--- a/app/src/main/res/layout/student_activity.xml
+++ b/app/src/main/res/layout/student_activity.xml
@@ -5,10 +5,18 @@
     android:orientation="vertical"
     android:background="#ffffff">
 
+    <TextView
+        android:text="@string/student_intro"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:id="@+id/textView" />
+
     <TextView
         android:id="@+id/bluetoothstate"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
+        android:gravity="center"
         />
 
     <Button
@@ -24,12 +32,6 @@
         android:text="@string/terminate"
         />
 
-    <ListView
-        android:id="@+id/devicesfound"
-        android:layout_width="fill_parent"
-        android:layout_height="fill_parent"
-        />
-
     <ListView
         android:id="@android:id/list"
         android:layout_width="fill_parent"
@@ -39,4 +41,10 @@
         android:cacheColorHint="#00000000"
         />
 
+    <ListView
+    android:id="@+id/devicesfound"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent"
+    />
+
 </LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 44349fc..005aedc 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -34,5 +34,8 @@
     <string name="title_section_activity">Secciones</string>
     <string name="title_student_activity">Estudiantes</string>
     <string name="terminate">Culminar Clase</string>
+    <string name="course_intro"> \n Bienvenido \n Lista de Materias Disponibles\n</string>
+    <string name="section_intro"> \n Lista de Secciones Disponibles\n</string>
+    <string name="student_intro"> \n Lista de Estudiantes de la Sección\n Recuerde que debe Escanear los dispositivos al menos una vez. \n</string>
 
 </resources>
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
index 766ab99..0be41e3 100644
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -4,5 +4,4 @@
     <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
         <!-- Customize your theme here. -->
     </style>
-
 </resources>