In the following lesson, we shall cover the long vowel-marks insha'Allah.  The long vowel-marks are basically a combination of a) the single vowel and, b) a letter used to lengthen the sound of the vowel.

The Alif al-madd is the long vowel lengthening the sound of the Fatha from 'a' into 'aa'.  We have not covered the joining of letters yet, so just read the letters lengthening the sound, we shall cover the way the letters change shape when joining in a later lesson Insha'Allah.