The 28 Hijaiyah Letters, Their Dots and Their Joined Shapes
The Arabic alphabet used for the Quran is usually counted as 28 letters. Some books count 29 because they list hamzah apart from alif, or add lam-alif as its own letter. The count changes nothing in practice. A learner needs two things: telling apart letters that share a base shape, and recognising a letter after it changes shape inside a word.
Grouping letters by their skeleton is the fastest way in. Ba, ta and tsa are one shape, told apart only by how many dots sit where. The early Iqro pages repeat that trick again and again. A single dot above ain turns it into ghain, and three dots above sin make syin. Dal and dzal, ra and zai, tha and zha, shad and dhad each differ by one dot, fa and qaf share a near-identical loop, and jim, ha and kha are three letters on one body. Once learners see that dots carry most of the difference, the memory load drops by about half.
Joined shapes are the next hurdle. Most letters have a starting, middle, final and standalone form. Six letters, alif, dal, dzal, ra, zai and wau, always stand apart from whatever letter follows, which often makes beginners think a word has broken in two. A useful drill is to pick one letter, say ain, and circle every form of it on a single page of the reader.
The stage is done when shuffled cards get an instant answer and the same letters are still read correctly in the middle of a word.
Sort letters by body shape and dot count, then drill their joined forms, because that is where beginners mix them up most.