Introduction Charitable foundations, originated in Britain, was developed and popularized in American. They can help students relieve the economic burden, and encourage them to study hard. Typically, a charitable foundation doesn’t expect to get paid, but the better students’ performance is, the greater chance that their schools will get investments. Moreover, the performance of students can be improved in repayment rate, earnings after ten years, etc. Thus, we define ROI in an appropriate manner and develop a model that can work out an optimal investment strategy.

What's the meaning of the time duration in this sentence? What's the meaning of the time duration in this sentence? Identify the time duration that the organization's money should be provided to have the highest likelihood of producing a strong positive effect on student performance. Which is " The time duration " , " the effect time duration " or " money donation duration "?

What's the meaning of these two items? 3-year repayment rate for high-income(above $ 75,000 in nominal family income) students, suppressed for n=30 200% completion rate for four-year institutions, pooled in two-year rolling averages and suppressed for small n size I know every words of these two items, but I don't know the logical meaning.

How to express that spending money is easy, but returns are difficult to getting in investment?

Company always,love always Today,one of my best friends asked me for my address,and she wanted to send me a GRE words book so that we could recite words together. She is Ran and my classmates in high school who touched me most. She was the flag bearer during the week of military training.Unfortunately,she suffered severe altroviolet allergy and sunburn.But she got through it for the honour of our class.From then on I remembered the tough-minded girl. And then her seat was near mine,so we got familiar soon. She earned the nickname Second Sister ,because she is very funny,cute and tall. There are many funny things between us and other classmates.Once when I turned around and talk to her,I upsetted an inkstand and ruined the coat of another friend.However, he didn't see it.That's why Ran and I erased the stains using a "magic pen" and suppressing our smiles in all afternoon. We had a happy time in first two years in high school.But then a bad girl quarreled with her and most of classmates isolated the bad girl,which made our class teacher very angry.The teacher gave a painful lesson to those who isolated the bad girl.Ran felt so sorry to us that she transferred to a international school in Beijing .After several months,she went to America. There was very little contact between she and friends because she was not okay in the first year.She found her boyfriend in America had a tendency of domestic violence. She said she missed us more when she contacted us. What makes us feel gratifying is that everything has been past. Last summer vacation,We held a party to welcome her home,a real home consisting of our classmates.And now she often chat with me on WeChat.So I don't feel she is far away from me anymore wherever she is. Nothing beats the good times that you and your friends have shared.Most importantly,I don't wanna anyone disappears in my life once we became friends. Company always ,love always. （陪伴是最长情的告白） Thank you for reading my story.It would be kind of you to correct me.

fighting~ It's final week and I'm struggled for reviewing the knowledge I had in this term.I learned Algorithm，Optional System and Fundementals of Compiling.Maybe it seems to many people that Chinese student is typically diligent，but actually it is ture. There is a strong mind in my heart that I want to go abroad to learn more advanced technology，culture and meet interesting people.Because my life before college is bored and lonely(I am the single child in my family，I went to a senior school far away from my hometown，and no mobilephone to connact with old friends.T_T) Although it isn't so busy in college ，I find my dream and fight just for being a better person. I'll appreciate it if you correct my mistakes*^_^*