We look at the night sky and the stars always appear the same.  Closer inspection reveals otherwise, however.  Many, called variable stars, vary in brightness for several different reasons.
        Our choice here is an eclipsing variable.  A dimmer star in orbit around a brighter star places itself between us and the primary star, making it appear dimmer; thus it's called an eclipsing variable.  Algol is an eclipsing variable with a period of 2.8 days.  The brightness varies from mag 2.1 to 3.4 for about 10 hours.  This is an easy naked-eye observation to make.  I hope you will find the time to observe the variations of Algol.
        The comparison stars on the chart are Mirfak (Alpha Persei) for Algol's maximum and Nu Persei for its minimum.  You can locate those stars by noting their angles in deg from Algol.  Remember, the distance across your fist viewed at arm's length is about 10 deg.
        Sky and Telescope (Feb, 2000, p 109) publishes the times of Algol's minima each month.  The eclipses start about 5 hours before and end about 5 hours after the minima.  Here are the minima for Feb & Mar, with CST times: 2/22 4:28, 2/25 1:17, 2/27 22:07, 3/1 6:56,  3/4 15:45, 3/7 12:34, 3/10 9:24, 3/13  6:13, 3/16 3:02, 3/18 23:02, 3/21 20:41.  Of course, you won't be able to see Algol during daylight hours.