diff --git a/1ano/2semestre/poo/README.md b/1ano/2semestre/poo/README.md
index 2188a49..0335569 100755
--- a/1ano/2semestre/poo/README.md
+++ b/1ano/2semestre/poo/README.md
@@ -21,6 +21,7 @@
 | [06](https://github.com/TiagoRG/uaveiro-leci/tree/master/1ano/2semestre/poo/src/aula06) | Inheritance             |
 | [07](https://github.com/TiagoRG/uaveiro-leci/tree/master/1ano/2semestre/poo/src/aula07) | Polymorphism            |
 | [08](https://github.com/TiagoRG/uaveiro-leci/tree/master/1ano/2semestre/poo/src/aula08) | Interfaces, Collections |
+| [09](https://github.com/TiagoRG/uaveiro-leci/tree/master/1ano/2semestre/poo/src/aula09) | Collections             |
 
 ---
 *Pode conter erros, caso encontre algum, crie um* [*ticket*](https://github.com/TiagoRG/uaveiro-leci/issues/new)
diff --git a/1ano/2semestre/poo/src/README.md b/1ano/2semestre/poo/src/README.md
index e7a7bb8..aef3573 100644
--- a/1ano/2semestre/poo/src/README.md
+++ b/1ano/2semestre/poo/src/README.md
@@ -13,6 +13,7 @@
 | [06](https://github.com/TiagoRG/uaveiro-leci/tree/master/1ano/2semestre/poo/src/aula06) | Inheritance             |
 | [07](https://github.com/TiagoRG/uaveiro-leci/tree/master/1ano/2semestre/poo/src/aula07) | Polymorphism            |
 | [08](https://github.com/TiagoRG/uaveiro-leci/tree/master/1ano/2semestre/poo/src/aula08) | Interfaces, Collections |
+| [09](https://github.com/TiagoRG/uaveiro-leci/tree/master/1ano/2semestre/poo/src/aula09) | Collections             |
 
 ---
 *Pode conter erros, caso encontre algum, crie um* [*ticket*](https://github.com/TiagoRG/uaveiro-leci/issues/new)
diff --git a/1ano/2semestre/poo/src/aula09/README.md b/1ano/2semestre/poo/src/aula09/README.md
new file mode 100755
index 0000000..04dece5
--- /dev/null
+++ b/1ano/2semestre/poo/src/aula09/README.md
@@ -0,0 +1,23 @@
+# Programação Orientada a Objetos
+## Aula 09
+### Tópico principal da aula: Collections
+
+* [Guião](https://github.com/TiagoRG/uaveiro-leci/tree/master/1ano/2semestre/poo/guides/POO-2022-aula09.pdf)
+
+### File List per Exercise
+
+#### Ex1
+* [ALDemo.java](https://github.com/TiagoRG/uaveiro-leci/blob/master/1ano/2semestre/poo/src/aula09/ex1/ALDemo.java)
+
+#### Ex2
+* [CollectionTester.java](https://github.com/TiagoRG/uaveiro-leci/blob/master/1ano/2semestre/poo/src/aula09/ex2/CollectionTester.java)
+
+#### Ex3
+* [PlaneTester.java](https://github.com/TiagoRG/uaveiro-leci/blob/master/1ano/2semestre/poo/src/aula09/ex3/PlaneTester.java)
+* [PlaneManager.java](https://github.com/TiagoRG/uaveiro-leci/blob/master/1ano/2semestre/poo/src/aula09/ex3/PlaneManager.java)
+* [Plane.java](https://github.com/TiagoRG/uaveiro-leci/blob/master/1ano/2semestre/poo/src/aula09/ex3/Plane.java)
+* [CommercialPlane.java](https://github.com/TiagoRG/uaveiro-leci/blob/master/1ano/2semestre/poo/src/aula09/ex3/CommercialPlane.java)
+* [MilitaryPlane.java](https://github.com/TiagoRG/uaveiro-leci/blob/master/1ano/2semestre/poo/src/aula09/ex3/MilitaryPlane.java)
+
+---
+*Pode conter erros, caso encontre algum, crie um* [*ticket*](https://github.com/TiagoRG/uaveiro-leci/issues/new)