diff --git a/03a-binding-and-modeling/YahooWeather.mxml b/03a1-binding-and-modeling/YahooWeather.mxml similarity index 100% rename from 03a-binding-and-modeling/YahooWeather.mxml rename to 03a1-binding-and-modeling/YahooWeather.mxml diff --git a/03a-crud-dynamic/CRUDDynamic.mxml b/03a2-crud-dynamic/CRUDDynamic.mxml similarity index 100% rename from 03a-crud-dynamic/CRUDDynamic.mxml rename to 03a2-crud-dynamic/CRUDDynamic.mxml diff --git a/03a-crud-dynamic/dyn-employees.as b/03a2-crud-dynamic/dyn-employees.as similarity index 100% rename from 03a-crud-dynamic/dyn-employees.as rename to 03a2-crud-dynamic/dyn-employees.as diff --git a/03a-crud-static/CRUDStatic.mxml b/03a3-crud-static/CRUDStatic.mxml similarity index 100% rename from 03a-crud-static/CRUDStatic.mxml rename to 03a3-crud-static/CRUDStatic.mxml diff --git a/03a-crud-static/static-employees.as b/03a3-crud-static/static-employees.as similarity index 100% rename from 03a-crud-static/static-employees.as rename to 03a3-crud-static/static-employees.as diff --git a/03a-external-interface/Main.mxml b/03a4-external-interface/Main.mxml similarity index 100% rename from 03a-external-interface/Main.mxml rename to 03a4-external-interface/Main.mxml diff --git a/03a-local-connections/BasicTaskReceiver.mxml b/03a5-local-connections/BasicTaskReceiver.mxml similarity index 100% rename from 03a-local-connections/BasicTaskReceiver.mxml rename to 03a5-local-connections/BasicTaskReceiver.mxml diff --git a/03a-local-connections/TaskSender.mxml b/03a5-local-connections/TaskSender.mxml similarity index 100% rename from 03a-local-connections/TaskSender.mxml rename to 03a5-local-connections/TaskSender.mxml diff --git a/03a-shared-objects/SharedObjectExample.mxml b/03a6-shared-objects/SharedObjectExample.mxml similarity index 100% rename from 03a-shared-objects/SharedObjectExample.mxml rename to 03a6-shared-objects/SharedObjectExample.mxml diff --git a/03a-validation-and-formatting/ValidatorsandFormattersExampleWithAreaCodeLookup.mxml b/03a7-validation-and-formatting/ValidatorsandFormattersExampleWithAreaCodeLookup.mxml similarity index 100% rename from 03a-validation-and-formatting/ValidatorsandFormattersExampleWithAreaCodeLookup.mxml rename to 03a7-validation-and-formatting/ValidatorsandFormattersExampleWithAreaCodeLookup.mxml diff --git a/03b-event-listeners/VBoxDemo.mxml b/03b1-event-listeners/VBoxDemo.mxml similarity index 100% rename from 03b-event-listeners/VBoxDemo.mxml rename to 03b1-event-listeners/VBoxDemo.mxml diff --git a/03b-event-propagation/DemoApplication.mxml b/03b2-event-propagation/DemoApplication.mxml similarity index 100% rename from 03b-event-propagation/DemoApplication.mxml rename to 03b2-event-propagation/DemoApplication.mxml