This is for school, so please don't say that there is nothing Catholics can learn from other religions. How do these religions enrich their own faith?
I think the main thing that we can learn from one another is that for all of our differences, we have more similarities. We are really fighting over minor details in the scheme of things. We are all humans, we all share Earth, and we need to work together.
Catholics might learn from the successes of Protestants and Muslims in reaching out to people outside their own cultures. Both of these highly evangelical faiths preach messages of self-empowerment and self-respect, and they generally manage to do so while demonstrating a considerable amount of respect for local customs. Catholics could preach the same message, and it would resonate equally, perhaps even more given the fact that the Church provides a strong institutional foundation for a global community of believers.
Catholics could learn about integrating female priests and non-celibate clergy from most branches of Protestantism. This would allow them to recruit more clergy and possibly avoid some of the problems commonly associated with an all-male celibate clergy.
I agree that Christians could learn a lot from Islam is the focus upon rituals. I think that many Christians focus upon their faith when the "church" calls (Sundays, Wednesdays, and religious holidays). The fact that Islam focuses upon their faith every day is important.
While I understand that some people find security in the predictability and stability of the Mass and the repetition of the same ritual in worship every time, I treasure the variety of experiences I encounter in my church and in other Protestant worship settings. I gain new insights into my relationship with God and with other people when I hear different types of music, see faith interpreted through different symbols or actions, do things in a different order, and so on.
This is a great question. All religions can learn from each other and the more they do, the wiser they will become. Moreover, I am sure that there will be many opinions. In light of this point, let me offer some suggestions.
Catholics can benefit from the antiquity of Judaism. This might sound odd, because Catholics usually boast about their long traditions. However, there are traditions that are longer than theirs. The Jews predate Catholicism. Hence, Catholics may benefit from critiquing their traditionalism with the traditions of Judaism and also grow in humility in this area.
Catholics can also learn to appreciate the beauty of diversity from Protestants. As you know, Protestants are a very very diverse group. More importantly, it is possible to be unity with diversity and with diversity there can be creativity. Protestantism can help in this area.