As the country becomes more diverse due to immigration, the debate over whether bilingual education will benefit immigrant children is timely. You could argue that bilingual education is important for immigrant children because it enables them to assimilate by learning English while still retaining their native culture and language. You could also argue that being bilingual will help them in their future careers and will make them well-rounded individuals.
Another good topic to discuss is the financial struggles of middle-class families. You could argue that one major way of helping middle-class families is by increasing opportunities for entrepreneurship. You could mention that, when families own businesses, they're in a situation to build wealth for future generations and maintain their middle-class status. Find credible sources on entrepreneurship from magazines such as Entrepreneur, Money, Forbes and Fortune. You could also get evidence for your claim from scholarly articles on JSTOR.org.
If you're interested in discussing race relations in your speech, you could argue against interracial adoptions by saying that it can be difficult for the adoptive parents to understand the culture of the children they adopt. You can also claim that the child risks losing her original cultural identity by being in a family that has a different culture. In a speech like this, be careful to discuss the other side of the issue and avoid stereotypical notions in your speech.
Because some low-income workers struggle with paying for housing, utilities and food, it can be difficult for them to advance financially and save for the future. You could argue that businesses that hire low-income employees are not doing enough to increase benefits for the workers and that more should be done. You could use government data from agencies such as the Department of Labor and the Department of Housing as evidence for your claim. If possible, interview local community activists and residents to get their views on the issue.