This tasks are not collaborative tasks yet. Your teacher is going to explain you the basics of App Inventor.
We are going to work...
2.1 Teaching App Inventor. You can see the document 'App Inventor a programming tool' to know what is App Inventor.
2.2 Practicing with App Inventor. Work with App Inventor and create your own projects...
2.3. Kahoot App Inventor. What do you have learned? With this Kahoot you will know it!