diff --git a/layer_styling/Create_proportional_symbols/__init__.py b/layer_styling/Create_proportional_symbols/__init__.py
index 6b6412e..e4d7a10 100644
--- a/layer_styling/Create_proportional_symbols/__init__.py
+++ b/layer_styling/Create_proportional_symbols/__init__.py
@@ -10,7 +10,8 @@
 
 
 # Lesson description
-lesson = Lesson("Create Proportional Symbols", "Layer styling", "00_lesson.html")
+lesson = Lesson("05. Create Proportional Symbols", "Layer styling",
+                "00_lesson.html")
 
 # Steps
 lesson.addStep("Set 'Wake_Public_Schools' layer as active layer", "01_activelayer.html",
@@ -31,4 +32,4 @@
 lesson.addStep("Confirm final results", "06_view_expression_results.html", steptype=Step.MANUALSTEP)
 
 # Suggested lessons
-lesson.addNextLesson("Layer styling", "Raster singleband styling")
+lesson.addNextLesson("Layer styling", "06. Raster singleband styling")
diff --git a/layer_styling/Labelling_vector_layers/__init__.py b/layer_styling/Labelling_vector_layers/__init__.py
index 5b74771..3b35786 100644
--- a/layer_styling/Labelling_vector_layers/__init__.py
+++ b/layer_styling/Labelling_vector_layers/__init__.py
@@ -10,7 +10,8 @@
 
 
 # Lesson description
-lesson = Lesson("Labelling vector layers", "Layer styling", "00_lesson.html")
+lesson = Lesson("11. Labelling vector layers", "Layer styling",
+                "00_lesson.html")
 
 # Steps
 lesson.addStep("Set 'Wake_ZIP_Codes' layer as active layer", "01_activelayer.html",
@@ -40,6 +41,3 @@
 lesson.addStep("Activate merge lines option", "10_merge_lines.html", steptype=Step.MANUALSTEP)
 
 lesson.addStep("Confirm merge lines results", "11_merge_lines_result.html", steptype=Step.MANUALSTEP)
-
-# Suggested lessons
-lesson.addNextLesson("Layer styling", "Setting layer's default style")
diff --git a/layer_styling/Manage_multiple_styles_in_a_layer/__init__.py b/layer_styling/Manage_multiple_styles_in_a_layer/__init__.py
index 7bf777e..1141780 100644
--- a/layer_styling/Manage_multiple_styles_in_a_layer/__init__.py
+++ b/layer_styling/Manage_multiple_styles_in_a_layer/__init__.py
@@ -8,7 +8,8 @@
 from lessons import addLessonModule
 
 # Lesson description
-lesson = Lesson("Manage multiple styles in a layer", "Layer styling", "00_lesson.html")
+lesson = Lesson("09. Manage multiple styles in a layer", "Layer styling",
+                "00_lesson.html")
 
 # Steps
 lesson.addStep("Introduction", "01_intro.html", steptype=Step.MANUALSTEP)
@@ -24,4 +25,4 @@
 lesson.addStep("Go back to previous style", "06_revert_to_population_density.html", steptype=Step.MANUALSTEP)
 
 # Suggested lessons
-lesson.addNextLesson("Layer styling", "Vector categorized symbols")
+lesson.addNextLesson("Layer styling", "10. Using data-defined properties")
diff --git a/layer_styling/Raster_multiband_styling/__init__.py b/layer_styling/Raster_multiband_styling/__init__.py
index 5fa2964..2463478 100644
--- a/layer_styling/Raster_multiband_styling/__init__.py
+++ b/layer_styling/Raster_multiband_styling/__init__.py
@@ -10,7 +10,8 @@
 
 
 # Lesson description
-lesson = Lesson("Raster multiband styling", "Layer styling", "00_lesson.html")
+lesson = Lesson("07. Raster multiband styling", "Layer styling",
+                "00_lesson.html")
 
 # Steps
 lesson.addStep("Set 'landsat_8_sample' layer as active layer", "01_activelayer.html",
@@ -31,4 +32,4 @@
 lesson.addStep("Confirm results", "06_set_543_infrared_color_results.html", steptype=Step.MANUALSTEP)
 
 # Suggested lessons
-lesson.addNextLesson("Layer styling", "Raster singleband styling")
+lesson.addNextLesson("Layer styling", "08. Setting layer's default style")
diff --git a/layer_styling/Raster_singleband_styling/__init__.py b/layer_styling/Raster_singleband_styling/__init__.py
index 8656626..a9b96f3 100644
--- a/layer_styling/Raster_singleband_styling/__init__.py
+++ b/layer_styling/Raster_singleband_styling/__init__.py
@@ -10,7 +10,8 @@
 
 
 # Lesson description
-lesson = Lesson("Raster singleband styling", "Layer styling", "00_lesson.html")
+lesson = Lesson("06. Raster singleband styling", "Layer styling",
+                "00_lesson.html")
 
 # Steps
 lesson.addStep("Set 'dem25' layer as active layer", "01_activelayer.html",
@@ -37,4 +38,4 @@
 lesson.addStep("Confirm results", "08_set_discrete_mode_results.html", steptype=Step.MANUALSTEP)
 
 # Suggested lessons
-lesson.addNextLesson("Layer styling", "Raster multiband styling")
+lesson.addNextLesson("Layer styling", "07. Raster multiband styling")
diff --git a/layer_styling/Setting_layer_default_style/__init__.py b/layer_styling/Setting_layer_default_style/__init__.py
index 723ebb6..cead96e 100644
--- a/layer_styling/Setting_layer_default_style/__init__.py
+++ b/layer_styling/Setting_layer_default_style/__init__.py
@@ -13,7 +13,8 @@ def copyTable():
 
 
 # Lesson's description
-lesson = Lesson ("Setting layer's default style", "Layer styling", "00_lesson.html")
+lesson = Lesson ("08. Setting layer's default style", "Layer styling",
+                 "00_lesson.html")
 
 # Steps
 lesson.addStep("Copy data", "Copy data", copyTable)
@@ -35,4 +36,4 @@ def copyTable():
 lesson.addStep('Conclusion', '06_conclusion.html', steptype=Step.MANUALSTEP)
 
 # Suggested lessons
-lesson.addNextLesson("Layer styling", "Manage multiple styles in a layer")
+lesson.addNextLesson("Layer styling", "09. Manage multiple styles in a layer")
diff --git a/layer_styling/Using_data_defined_properties/__init__.py b/layer_styling/Using_data_defined_properties/__init__.py
index c7d68a0..65c3421 100644
--- a/layer_styling/Using_data_defined_properties/__init__.py
+++ b/layer_styling/Using_data_defined_properties/__init__.py
@@ -5,7 +5,8 @@
 
 # Lesson's description
 
-lesson = Lesson ("Using data-defined properties", "Layer styling", "00_lesson.html")
+lesson = Lesson ("10. Using data-defined properties", "Layer styling",
+                 "00_lesson.html")
 
 
 # Steps
@@ -35,4 +36,4 @@
 
 # Suggested lessons
 
-lesson.addNextLesson("Layer styling", "Create Proportional Symbols")
\ No newline at end of file
+lesson.addNextLesson("Layer styling", "11. Labelling vector layers")
\ No newline at end of file
diff --git a/layer_styling/Vector_categorized_symbols/__init__.py b/layer_styling/Vector_categorized_symbols/__init__.py
index c980c7e..3c92d89 100644
--- a/layer_styling/Vector_categorized_symbols/__init__.py
+++ b/layer_styling/Vector_categorized_symbols/__init__.py
@@ -10,7 +10,8 @@
 
 
 # Lesson description
-lesson = Lesson("Vector categorized symbols", "Layer styling", "00_lesson.html")
+lesson = Lesson("02. Vector categorized symbols", "Layer styling",
+                "00_lesson.html")
 
 # Steps
 lesson.addStep("Set 'Downtown streets' layer as active layer", "01_activelayer.html",
@@ -43,4 +44,4 @@
 lesson.addStep("Confirm results", "10_reduce_classes_results.html", steptype=Step.MANUALSTEP)
 
 # Suggested lessons
-lesson.addNextLesson("Layer styling", "Vector graduated symbols")
+lesson.addNextLesson("Layer styling", "03. Vector graduated symbols")
diff --git a/layer_styling/Vector_graduated_symbols/__init__.py b/layer_styling/Vector_graduated_symbols/__init__.py
index a157fb7..571c3a3 100644
--- a/layer_styling/Vector_graduated_symbols/__init__.py
+++ b/layer_styling/Vector_graduated_symbols/__init__.py
@@ -10,7 +10,8 @@
 
 
 # Lesson description
-lesson = Lesson("Vector graduated symbols", "Layer styling", "00_lesson.html")
+lesson = Lesson("03. Vector graduated symbols", "Layer styling",
+                "00_lesson.html")
 
 # Steps
 lesson.addStep("Set 'Wake BlockGroup 2010' layer as active layer", "01_activelayer.html",
@@ -49,4 +50,4 @@
 lesson.addStep("Confirm results", "12_to_thousands_results.html", steptype=Step.MANUALSTEP)
 
 # Suggested lessons
-lesson.addNextLesson("Layer styling", "Vector rule-based symbols")
+lesson.addNextLesson("Layer styling", "04. Vector rule-based symbols")
diff --git a/layer_styling/Vector_rule-based_symbols/__init__.py b/layer_styling/Vector_rule-based_symbols/__init__.py
index e982cb6..3f28dc9 100644
--- a/layer_styling/Vector_rule-based_symbols/__init__.py
+++ b/layer_styling/Vector_rule-based_symbols/__init__.py
@@ -10,7 +10,8 @@
 
 
 # Lesson description
-lesson = Lesson("Vector rule-based symbols", "Layer styling", "00_lesson.html")
+lesson = Lesson("04. Vector rule-based symbols", "Layer styling",
+                "00_lesson.html")
 
 # Steps
 lesson.addStep("Introduction", "01_intro.html", steptype=Step.MANUALSTEP)
@@ -45,4 +46,4 @@
 lesson.addStep("Confirm the results", "11_set_update_rule_results.html", steptype=Step.MANUALSTEP)
 
 # Suggested lessons
-lesson.addNextLesson("Layer styling", "Create Proportional Symbols")
+lesson.addNextLesson("Layer styling", "05. Create Proportional Symbols")
diff --git a/layer_styling/Vector_single_symbol/__init__.py b/layer_styling/Vector_single_symbol/__init__.py
index 0688e09..e9bad83 100644
--- a/layer_styling/Vector_single_symbol/__init__.py
+++ b/layer_styling/Vector_single_symbol/__init__.py
@@ -5,7 +5,7 @@
 
 # Lesson's description
 
-lesson = Lesson ("Vector Single Symbol", "Layer styling", "00_lesson.html")
+lesson = Lesson ("01. Vector Single Symbol", "Layer styling", "00_lesson.html")
 
 
 # Steps
@@ -27,4 +27,4 @@
 
 # Suggested lessons
 
-lesson.addNextLesson("Layer styling", "Vector categorized symbols")
\ No newline at end of file
+lesson.addNextLesson("Layer styling", "02. Vector categorized symbols")
\ No newline at end of file