For elementary - intermediate levels.
Will (future simple):
- General intentions: We will do it tomorrow.
- Predictions or opinions: Our team will loose.
- Decisions made at the moment of speaking: The bag is so heavy. - I'll help you.
- Future plans: We are going to move.
- Predictions: Look at that! He is going to win.
- Future arrangements: I am going on holiday in June.
Future simple and future continuous Exercises to learn the difference.