In September 1942, Kennedy transferred to his third boarding school, Milton Academy , in Milton, Massachusetts , for eleventh and twelfth grades.  His father, Joseph Kennedy Sr., wanted Kennedy to transfer to Milton, believing it would better prepare his son for Harvard.  At Milton, he met and became friends with David Hackett . He invited Hackett to join him for Sunday mass. Hackett started accompanying him, and was impressed when Kennedy took it upon himself to fill in for a missing altar boy one Sunday.  Hackett admired Kennedy's determination to bypass his shortcomings, and remembered him redoubling his efforts whenever something did not come easy to him, which included athletics, studies, success with girls, and popularity.  Hackett remembered the two of them being "misfits", a commonality that drew him to Kennedy, along with an unwillingness to conform to how others acted even if doing so meant not being accepted.  Kennedy's grades improved.
Dear Ash, thank you for your question. It is difficult to answer briefly as different areas of the LM needed to be treated differently. Some components had to be kept cold, others warm, for example the ascent engine fuel tanks needed to be kept at room temperature. This was achieved by clever use of passive thermal control materials. As the article you commenting on says “Much of the exterior was covered in protective multi-layer insulation foil…” so your belief that insulation material was too heavy is not correct. Areas needing to be kept cool were covered with reflective insulation (of different types selected for optimum reflectivity), areas needing to be kept warm were covered in black materials. The Descent Stage is almost completely covered in this multi-layer foil. The Ascent Stage used it too but many area of it were covered in aluminium that was painted, etched, or anodised to give each panel precise absorptive and reflective properties.
About self development, it has major effect on students. They learn new languages; they share interests with other students. They came to know how it feels to live independently. They learn how to take decisions without family support. They usually experience a different and new education system. They see new places which broadened their thoughts. All these things make them confident and powerful which leads them a successful life. Students who do research work can create a lot of possibilities for themselves because new place always has some new research facilities. Sometimes some theoretical and practical gadgets which is not available at their home country can be available at new institute which can help in their research.