Put the money in the fruit box and suggest that the teacher eat+before going home. Can she understand?

Put the money in the fruit box, suggesting that the teacher should eat first when he goes home. Whether she can understand depends on the tacit understanding and communication between you. If you have had similar hints or exchanges before, the teacher may understand you. But if this is the first time, the teacher may be confused or puzzled.

It is suggested that you clearly inform the teacher of your intention through language or words before you put money in order to avoid misunderstanding and unnecessary confusion. If you don't have a tacit understanding, or the teacher is confused by your hints, you'd better communicate directly and make your thoughts clear. This will ensure that your intentions are accurately conveyed, and also help to strengthen communication and trust between you.