Strayer Education ( STRA) is a for-profit post-secondary education company that offers a variety of academic programs through Strayer University. The numbers: First-quarter revenue increased 28% to $125 million as net income jumped 24% to $29 million and earnings per share improved 26% to $2.07. Operating margin stood at 38% and net margin remained strong at 23%. Strayer has no debt and a quick ratio of 1.5, indicating an ideal financial position. The stock: Strayer has fallen 7% in 2009, underperforming the Dow and S&P 500. The stock is trading at a price-to-earnings ratio of 33. A 1% dividend yield sweetens the stock, but is below the S&P 500 average. National Presto Industries ( NPK) manufactures small appliances, and defense and absorbent products. The numbers: First-quarter revenue increased 40% to $108 million as net income and earnings per share ascended 74% to $11 million and $1.58, respectively. Operating margin improved to 14% and net margin remained steady at 10%. The company has no debt or interest expenses but has abundant cash reserves, as reflected by a quick ratio of 3.6. The stock: National Presto is up 2% in 2009, outperforming the Dow and the S&P 500. The stock trades at a price-to-earnings ratio of 11 and offers a meager 1.3% dividend yield. Quality Systems ( QSII) develops and markets health-care information systems that automate medical and dental practices and networks of practices. The numbers: Fiscal fourth-quarter revenue rose 28% to $66 million as net income inched up 1% to $11.4 million and earnings per share fell 2% to 40 cents. Operating margin fell to 28% and net margin declined to 17%. The company has no debt or interest expenses and a strong cash balance, as indicated by a quick ratio of 2.1. The stock: Quality Systems has climbed 24% in 2009, outperforming all major U.S. indexes. The stock trades at an expensive price-to-earnings ratio of 33 and offers a dividend yield of 2.2%. TSC Ratings was given an award for "Best Stock Selection" amongst independent research providers by BNY ConvergEx Group. To see how your portfolio can utilize our research, click here. A rating can be viewed for any stock through our screener. Each rating is derived from a variety of fundamental and pricing figures and represents our opinion of risk-adjusted performance relative to a 5,000+ stock coverage universe. However, the rating does not incorporate all factors that can alter a stock's performance, such as corporate or industry events, technology innovations and shifts in competitive dynamics.