diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index c5388673..4e809209 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -2,7 +2,7 @@ class ApplicationController < ActionController::Base
   include CustomPaths
   helper  CustomPaths
 
-  before_action :set_time_zone
+  before_action :set_time_zone, :set_notifications_for_current_user
 
   helper_method :can_edit?, :logged_in?, :admin?
 
@@ -41,4 +41,8 @@ def require_admin
   def set_time_zone
     Time.zone = 'Sofia'
   end
+
+  def set_notifications_for_current_user
+    @notifications = Notification.unread_for_user(current_user) if user_signed_in?
+  end
 end
diff --git a/app/controllers/notifications_controller.rb b/app/controllers/notifications_controller.rb
new file mode 100644
index 00000000..7a366864
--- /dev/null
+++ b/app/controllers/notifications_controller.rb
@@ -0,0 +1,10 @@
+class NotificationsController < ApplicationController
+  def index
+  end
+
+  def show
+    notification = Notification.find params[:id]
+    notification.mark_as_read
+    redirect_to notification.source
+  end
+end
diff --git a/app/models/challenge.rb b/app/models/challenge.rb
index 9dc3c9be..1992c320 100644
--- a/app/models/challenge.rb
+++ b/app/models/challenge.rb
@@ -3,6 +3,8 @@ class Challenge < ActiveRecord::Base
 
   validates :name, :description, presence: true
 
+  after_create :post_notification
+
   class << self
     def in_chronological_order
       order('created_at ASC')
@@ -16,4 +18,8 @@ def visible
   def closed?
     closes_at.past?
   end
-end
+
+  def post_notification
+    Notification.create_notifications_for self, to: User.all, title: "Новo предизвикателство: #{name}"
+  end
+end
\ No newline at end of file
diff --git a/app/models/notification.rb b/app/models/notification.rb
new file mode 100644
index 00000000..bd8f5655
--- /dev/null
+++ b/app/models/notification.rb
@@ -0,0 +1,27 @@
+class Notification < ActiveRecord::Base
+  belongs_to :user
+  belongs_to :source, polymorphic: true
+
+  def mark_as_read
+    self.read = true
+    save!
+  end
+
+  class << self
+    def unread_for_user(user)
+      where(user_id: user.id, read: false)
+    end
+
+    def create_notifications_for(source, to: nil, title: nil)
+      unless to.nil?
+        to.find_each do |user|
+          Notification.create do |notification|
+            notification.title = title
+            notification.source = source
+            notification.user = user
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/app/models/reply.rb b/app/models/reply.rb
index 838536a9..08e2816f 100644
--- a/app/models/reply.rb
+++ b/app/models/reply.rb
@@ -1,10 +1,13 @@
 class Reply < Post
   belongs_to :topic
+  belongs_to :user
 
   attr_accessible :body
 
   validates :topic_id, presence: true
 
+  after_create :post_notification
+
   def topic_title
     topic.title
   end
@@ -13,4 +16,10 @@ def page_in_topic
     replies_before_this = topic.replies.where('id < ?', id).count
     replies_before_this / Reply.per_page + 1
   end
+
+  private
+
+  def post_notification
+    Notification.create_notifications_for topic, to: topic.participants, title: "Нов отговор в тема: #{topic_title}"
+  end
 end
diff --git a/app/models/task.rb b/app/models/task.rb
index 3fda9a47..af24d087 100644
--- a/app/models/task.rb
+++ b/app/models/task.rb
@@ -8,6 +8,8 @@ class Task < ActiveRecord::Base
   scope :checked, -> { where checked: true }
   scope :in_chronological_order, -> { order 'created_at ASC' }
 
+  after_create :post_notification
+
   class << self
     def visible
       in_chronological_order.where(hidden: false)
@@ -45,4 +47,8 @@ def restrictions_must_be_valid_yaml
   rescue Psych::SyntaxError
     errors.add :restrictions, :invalid
   end
+
+  def post_notification
+    Notification.create_notifications_for self, to: User.all, title: "Нова задача: #{name}"
+  end
 end
diff --git a/app/models/topic.rb b/app/models/topic.rb
index e4ecb7dd..1befdcfa 100644
--- a/app/models/topic.rb
+++ b/app/models/topic.rb
@@ -1,5 +1,7 @@
 class Topic < Post
   has_many :replies, -> { order 'created_at ASC' }
+  
+  has_many :participants, -> { uniq }, through: :replies, source: :user
 
   attr_accessible :title, :body
 
diff --git a/app/models/user.rb b/app/models/user.rb
index b6cfbd74..39e57137 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -5,6 +5,7 @@ class User < ActiveRecord::Base
   has_many :solutions
   has_many :tips
   has_many :attributions
+  has_many :notifications
 
   attr_protected :full_name, :faculty_number, :email, :admin
 
diff --git a/app/views/layouts/application.html.haml b/app/views/layouts/application.html.haml
index 5e249698..226a19b1 100644
--- a/app/views/layouts/application.html.haml
+++ b/app/views/layouts/application.html.haml
@@ -21,6 +21,7 @@
         %ul
           - if user_signed_in?
             %li Здрасти, #{link_to current_user.name, edit_profile_path}
+            %li.notifications-link #{link_to 'Известия', notifications_path} (#{@notifications.count})
             %li= link_to 'Изход', destroy_user_session_path
           - else
             %li= link_to 'Вход', new_user_session_path
diff --git a/app/views/notifications/index.html.haml b/app/views/notifications/index.html.haml
new file mode 100644
index 00000000..51217e01
--- /dev/null
+++ b/app/views/notifications/index.html.haml
@@ -0,0 +1,11 @@
+%h1 Известия
+
+%p
+  Общо известия:
+  %strong= @notifications.count
+
+%table
+  %tbody
+    - @notifications.each do |notification|
+      %tr
+        %td.name.notification-name= link_to notification.title, notification
\ No newline at end of file
diff --git a/config/routes.rb b/config/routes.rb
index 1366c7d3..e4b557fc 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -6,6 +6,8 @@
 
   resources :vouchers, only: %w(index new create)
 
+  resources :notifications, only: %w(index show)
+
   resources :announcements, except: %w(destroy)
   resource :profile, only: %w(edit update)
   resource :leaderboard, only: :show
diff --git a/db/migrate/20150518105230_create_notifications.rb b/db/migrate/20150518105230_create_notifications.rb
new file mode 100644
index 00000000..e4d39de9
--- /dev/null
+++ b/db/migrate/20150518105230_create_notifications.rb
@@ -0,0 +1,19 @@
+class CreateNotifications < ActiveRecord::Migration
+  include ForeignKeys
+  
+  def self.up
+    create_table(:notifications) do |t|
+      t.string  :title, null: false
+      t.references :source, polymorphic: true
+      t.boolean :read, default: false
+      t.references  :user
+      t.timestamps
+    end
+
+    foreign_key :notifications, :user_id
+  end
+
+  def self.down
+    drop_table :notifications
+  end
+end
diff --git a/features/notifications.feature b/features/notifications.feature
new file mode 100644
index 00000000..61001a76
--- /dev/null
+++ b/features/notifications.feature
@@ -0,0 +1,45 @@
+# language: bg
+Функционалност: Известия
+  Студентите получават известия, когато бъде публикувана задача,
+  предизвикателсвто или отговор във форум тема
+
+  Сценарий: Получаване на известие при публикуване на задача
+    Дадено че съм влязъл като администратор
+    Когато създам задача:
+      | Име     | Първа задача      |
+      | Условие | Напишете програма |
+    То трябва да съществува известие "Нова задача: Първа задача"
+
+  Сценарий: Получаване на известие при публикуване на предизвикателство
+    Дадено че съм влязъл като администратор
+    Когато създам предизвикателство "Четене на субтитри"
+    То трябва да съществува известие "Новo предизвикателство: Четене на субтитри"
+
+  Сценарий: Получаване на известие при публикуване на отговор в тема
+    Дадено че съм студент
+    Дадено че съществува тема "Въпрос"
+    И че темата "Въпрос" има "1" отговора, последния от които на "Петър Петров"
+    Когато отговоря на "Въпрос" с:
+      """
+      Моят текст
+      """
+    То трябва да съществува известие "Нов отговор в тема: Въпрос"
+
+  Сценарий: Потребителите виждат само непрочетени известия
+    Дадено че съм студент
+    Дадено че съществува известие "Прочетено известие"
+    Дадено че съществува непрочетено известие "Ново непрочетено известие"
+    Когато отворя страницата с известията
+    То трябва да виждам известие "Ново непрочетено известие"
+    И трябва да не виждам известие "Прочетено известие"
+    И броя на новите известия трябва да е 1
+
+  Сценарий: Когато избера ново известие съм пренасочен към страницата на първоизточника
+    Дадено че съм влязъл като администратор
+    Когато създам задача:
+      | Име     | Първа задача      |
+      | Условие | Напишете програма |
+    И отворя страницата с известията
+    И избера известието "Нова задача: Първа задача"
+    То трябва да съм на задачата "Първа задача"
+    И броя на новите известия трябва да е 0
\ No newline at end of file
diff --git a/features/step_definitions/notifications_steps.rb b/features/step_definitions/notifications_steps.rb
new file mode 100644
index 00000000..0aafc010
--- /dev/null
+++ b/features/step_definitions/notifications_steps.rb
@@ -0,0 +1,39 @@
+Дадено 'че съществува известие "$title"' do |title|
+  create :notification, title: title, user_id: current_user.id, read: true
+end
+
+Дадено 'че съществува непрочетено известие "$title"' do |title|
+  create :notification, title: title, user_id: current_user.id, read: false
+end
+
+Когато 'отворя страницата с известията' do
+  visit notifications_path
+end
+
+Когато 'избера известието "$title"' do |title|
+  notification = Notification.find_by_title! title
+  visit notification_path(notification)
+end
+
+То 'трябва да виждам известие "$title"' do |title|
+  within ".notification-name" do
+    page.should have_content title
+  end
+end
+
+То 'трябва да не виждам известие "$title"' do |title|
+  within ".notification-name" do
+    page.should_not have_content title
+  end
+end
+
+То 'броя на новите известия трябва да е $count' do |count|
+  within ".notifications-link" do
+    page.should have_content "(#{count})"
+  end
+end
+
+То 'трябва да съществува известие "$title"' do |title|
+  notification = Notification.find_by_title! title
+  notification.should_not be_blank
+end
diff --git a/spec/controllers/notifications_controller_spec.rb b/spec/controllers/notifications_controller_spec.rb
new file mode 100644
index 00000000..a71ed5bb
--- /dev/null
+++ b/spec/controllers/notifications_controller_spec.rb
@@ -0,0 +1,22 @@
+require 'spec_helper'
+
+describe NotificationsController do
+  describe "GET index" do
+    it "assigns unread user notifications to @notifications" do
+      controller.stub_chain(:current_user).and_return(:user)
+      Notification.should_receive(:unread_for_user).with(:user).and_return('notifications')
+      get :index
+      assigns(:notifications).should eq 'notifications'
+    end
+  end
+
+  describe "GET show" do
+    notification = FactoryGirl.build_stubbed(:notification)
+
+    it "marks notification as read and redirects to its source" do
+      Notification.should_receive(:find).with('3').and_return(notification)
+      get :show, id: '3'
+      response.should redirect_to notification.source
+    end
+  end
+end
diff --git a/spec/factories.rb b/spec/factories.rb
index 52517e4e..8dc2de43 100644
--- a/spec/factories.rb
+++ b/spec/factories.rb
@@ -36,6 +36,12 @@
     user
   end
 
+  factory :notification do
+    title 'Title'
+    association :source, factory: :topic 
+    user
+  end
+
   factory :reply do
     body 'Body'
     topic
diff --git a/spec/models/notification_spec.rb b/spec/models/notification_spec.rb
new file mode 100644
index 00000000..3796a33e
--- /dev/null
+++ b/spec/models/notification_spec.rb
@@ -0,0 +1,9 @@
+require 'spec_helper'
+
+describe Notification do
+  it "can be marked as read" do
+    notification = create(:notification)
+    notification.mark_as_read
+    notification.read.should eq true
+  end
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 437e3ff3..c1545de4 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -44,5 +44,10 @@
     config.include EmailSpec::Helpers, type: :mailer
     config.include EmailSpec::Matchers, type: :mailer
     config.include CustomPaths, type: :mailer
+    config.include Devise::TestHelpers, :type => :controller
+    
+    config.before(:each, type: :controller) do
+      allow(Notification).to receive(:unread_for_user).and_return([])
+    end
   end
 end