Mastoidectomy is a surgical procedure to remove an infected portion of the bone behind the ear when medical treatment is not effective. This surgery is rarely needed today because of the widespread use of antibiotics.astoidectomy is a surgical procedure to remove an infected portion of the bone behind the ear when medical treatment is not effective. This surgery is rarely needed today because of the widespread use of antibiotics.
The Germans had little choice â few other places besides the United States allowed German immigration. Unlike the Irish, many Germans had enough money to journey to the Midwest in search of farmland and work. The largest settlements of Germans were in New York City, Baltimore, Cincinnati, St. Louis and Milwaukee.n the decade from 1845 to 1855, more than a million Germans fled to the United States to escape economic hardship. They also sought to escape the political unrest caused by riots, rebellion and eventually a revolution in 1848.
I think that immigration is one of the most significant, and certainly the most overlooked challenges faced by US schools. Let me also say that I am not taking a position on immigration (in fact I have very liberal views on immigration), but rather considering the impact of immigration on American classrooms. There are two ways in which immigration has a significant impact on schools in the US: quantity and variation. Nearly 20% of the world's immigrants live in the US, over 45 million people. That's almost 15% of the nation's population, and close to 20% of its school-aged population.