Simple Voice Recording

It doesn't take much to record your voice while you are presenting to students.  If you have a smartphone, you have a recorder.  On my Android phone, I downloaded Easy Voice Recorder (free, or Pro version for $4).  You can use this program to record notes for yourself any time with the built-in microphone.  With a phone headset, you can record yourself while you are explaining something in your classroom, then upload that file to your class website so students can listen to you again (or for the first time).  For iOS, try SuperNote (free or $2 paid version), which does simple voice recording along with text or picture notes.  You can also use Evernote for voice recording, on either Android or iOS.  Think about how many times you explain something in your classroom.  Then think about explaining it once and letting kids listen to it over and over and over and over .........