Chati ifuatayo inaonyesha usambazaji wa wanafunzi katika mihula ya masomo. Chati inaonyesha mipaka miwili ambayo wanafunzi wengi wanaangukia ndani yake. Mpaka wa kwanza unawakilisha wanafunzi wanaofaulu kukamilisha mihula 36 bila kuchukua likizo yoyote wakati wa masomo yao (kama inavyoonyeshwa kwenye chati kwa mraba mweusi), na hivyo kumaliza hatua za shule katika miaka 9, kipindi cha chini kabisa cha kukamilisha hatua 3 za shule. Mpaka mwingine unawakilisha mwanafunzi anayechukua muhula mmoja wa masomo kila mwaka kama likizo (kama inavyoonyeshwa kwa mraba wa kijivu) huku akipita mihula yote; hivyo anamaliza hatua za shule katika miaka 12 ya Hijria. Wanafunzi wengi wanaangukia kati ya mipaka hii miwili (kama inavyoonyeshwa kwa mraba wa mistari ya mlalo).

The following chart demonstrates the distribution of students across school terms. The chart shows two boundaries within which most students fall. The first represents students who successfully complete 36 terms without taking any holiday during their study (as shown in the chart by a black square) thus completing the school stages in 9 years, the minimum time period to complete the 3 school stages. The other boundary represents a student who take one study term yearly for holiday (as shown by the gray square) while passing all terms; hence he completes the school stages in 12 Hijri years. Most students fall between these two boundaries (as shown by the diagonal squares).

Kwa wanafunzi ambao hawawezi kumaliza hatua za shule ndani ya miaka 12 kwa sababu yoyote ile, kama vile ugonjwa, kushindwa mara kwa mara au nyinginezo, wanaruhusiwa kubaki shuleni hadi wafikie umri wa miaka 20. Safu ya mwisho ya chati (kuanzia miaka 17 hadi 20) inashughulikia hali hii.

As for students who cannot complete the school stages in 12 years for any reasons e.g. illness, repeated failure or otherwise, they are allowed to remain in school until they attain 20 years of age. The last column of the chart (from 17 to 20 years) covers this situation.