We're currently starting a unit on Japan during the Tokugawa shogunate and the practice of Bushido was only glossed over. I'd like to know more about it, as in, how it was practiced, what it entailed for samurai warriors, and when the practice seemed to end.
If anything, the idea of Bushido experienced tremendous growth in the Edo period. Bushido became one of the ideas that would be used to develop an idea of 'Japaneseness,' or a Japanese national identity following the Meiji reformation. It is important to understand that in many ways Bushido was an invented tradition. Its existence served to benefit the daimyo (feudal lords) by suggesting that samurai must be loyal retainers. Later, it was taken up in the process of identity-formation in the kokugaku school. Bushido, Nativist Shinto, mono no aware, etc, were all used to construct a modern Japanese identity.
You can think of the idea of samurai in the same way. Samurai became a symbol for Japan only after the samurai class had been systematically dismantled by the Meiji government. For example, the defining book on Bushido was written by Nitobe Inazo in English, for a Western audience. Inazo, like many Meiji thinkers, sought to define Japanese identity.
As for sources, I'm not really claiming anything unique here; this is all very general knowledge. You might want to look up the kokugaku school, or, if you are interested in Bushido specifically, read Inazo's somewhat ridiculous text, Bushido: The Soul of Japan; just keep in mind that Inazo's text is not taken seriously by anyone and is an example of history-making.
For a very good introduction to Japan, I sincerely recommend Tessa Morris-Suzuki's "Re-Inventing Japan: Time, Space, Nation"
"Phased out" is subjective. As late as the 1970's, a nationalistic author committed seppuku when the Jietai failed to respond well to his calls for greater military strength. Even today, the relics of bushido live on in Japanese culture. Piety to ones employer, for example. But obviously, the concept has "translated" if you will, to modern context. Politicians frequently resign with scandal, as opposed to lavish suicide methods. Company bosses have taken the role of feudal lords in some ways. One would assume that this change began in the Meiji period, in which Japan went through rapid westernization, and witnessed the death of the samurai class.