Number In A Series, Turn, Ordinal Number
You have to sickle the rice paddy today because it's your turn. This kanji also means number in a series, which is a lot like a turn. For example, you're number 3, so your turn will be number 3.
Go through in your mind the system your farm / village uses for deciding who has to sickle on any given day. It rotates, and it's a turn-based system. So, do you all stand in a line? Is there a calendar? Come up with something interesting, focusing on your turn in the process you come up with. It will be helpful to remember both the "number in a series" and "turn" meanings for the vocab coming up in the future.
ばん
つが, つがい
None
This turn-based rice sickle system is a contest as well! But, you are disappointed to find out that you have been banned(ばん) from the game because of the performance enhancing steroids you've been taking.
Try to feel disappointed by this. Strange thing to feel disappointed by, but you were a great sickler. You were going to win the great prize, too (come up with something huge!), but now you're banned for the season.