Purchase your digital voice recorder. Digital voice recorders come with a number of options such as controls to adjust the microphone's sensitivity, fast playback and long battery life. Make sure the recorder you buy has the options and the recording space that you will need.
Sit toward the front of your class so that your recorder will pick up the lecture. Ask your teacher if you can place the recorder at the front of the room.
Press "Record" on your recorder when class begins. You can utilize your digital voice recorder in different ways. You can take notes in class and use the recorded lecture for anything you missed or did not understand. Alternatively, you can pay attention in class and take notes from the recorded transcript later.
Attach your recorder to your computer using a USB cable. Upload the recorded lecture to your computer and save the file.
Review your lectures periodically throughout the week. Listen to the lectures and take notes or fill in the gaps in your class notes. You can also review the class lectures before an upcoming exam.