(Please, feel free to correct from the beggining) Today I was improving my listening of English and I listened and read the following phrase: "These qualities rubbed off on the students he taught" What does "rubbed off" on this expression means? Could somebody please help me with that?

Ajuda sobre Skype / velocidade de internet Boa tarde! Por favor, alguém me ajude: qual a velocidade mínima ideal da internet para uma aula via Skype? Em casa eu tenho internet via rádio e não é muito boa..... preciso me programar pra ir em outro lugar.

Diferences between American English vs British English Please spend a few minutes helping me, I'll be very thankfull! Since the passion of the language was born in my heart, when I was... 9 or 10 years old I think, I always liked (and prefered) the American English, because fo the movies, the musics and I had grown watching american movies on TV. But now that I am 33 years old, I have plans for moving with my family to Canada and the examination that is extremely impotant to give me that opportunity - IELTS - is based on British English! What can I do now? In Portuguese we have the same situation: there is Portuguese that is spoken in Brazil and there is Portuguese that is spoken in Portugal, there are a lot of diffference between of them! Please feel free to correct the text. God bless you.

Electrical Engineering Please, if someone is graduated or simply has some knowledge about electrical area, let's talk a little about common words in that area. Thank you all! Looking forward to talking to you!

Practicing writing in English Hello, my name is Felipe, I'm 32 years old, married and today I started a new and hard stage in my studying English process. The hardest part in my learning of English is writing. I think it's difficult for all because this is the more unusual thing to do in English on the daily life. I'm usually listening to music or English podcasts for improve my listening, I'm also always reading something in English on the internet and talking... well, even "talking to my self" it's a strange thing to do I'm sometimes speaking English alone and practicing the pronunciation. I think writing is the most difficult part because we live days that everything is very fast, information come and go in an incredible velocity and the learning process takes time. Seat, take a breath, open the dictionary and open the mind to write and keep exposed to error is a little tiring but necessary thing to do for the personal English improving at general. I really thank you for your helping and please feel free for correct my letter. Please, spend five minutes of your precious time helping me. Best regards.