As I'm not aware of this 'teacher go back to squanto story', it's difficult to determine the main idea. However, if Squanto has some significance in terms of history or education in this story, the main idea could revolve around how the teacher's return impacts the people or the educational system in Squanto. For example, the teacher might bring new knowledge or a different perspective back to Squanto, or perhaps rediscover something valuable from the past there.
I have no knowledge of the 'teacher go back to squanto story' so I can't accurately say what the main idea is. But generally speaking, if it's a story about a teacher going back to Squanto, it could be about renewal. Maybe the teacher had left Squanto previously and now is coming back to make a change, whether it's in the educational environment, like improving the local school, or in the social aspect, such as strengthening community ties. It could also be a story of self - discovery for the teacher, finding meaning in the place they once knew.