Use Yahoo Finance to track stock prices for one year (Basic Chart) and the date/volume/closing price (Historical Prices) for six weeks. The historical prices can be downloaded to Excel, where you can easily calculate net change.
When tracking a stock online, check the listing after 1:00 PM for today's closing price, because the New York Stock Exchange closes at 4:00 pm EST (1:00 pm PST).
Also check the press releases, income statement, and balance sheet using Google Finance.
Google Finance has the same basic information as Yahoo Finance. The summary section has one-year price tracking and a list of company officers. Historical prices has downloadable six weeks of date/volume/closing price. Financials defaults to quarterly data, so switch it to yearly data
Value Line Investment Survey. Located at SLO County Libraries and Cal Poly. Due to budget cuts, Cuesta no longer subscribes to Value Line. Value Line is updated often, has very current financial information, and is useful for your report. It looks hard to use, but go online to How to Use Value Line Pages for a good tutorial. If your company is one of the Dow 30, you can access their Value Line report for free at http://www.valueline.com/dow30/index.aspx.