Pre-primary: For P3 to P7 students, having two or more years of pre-primary experience boosts English competence by 15 percentage points, local language competence by 13 percentage points and numeracy by seven percentage points.
Kwa upande wa mazingira ya shule, ipo pia tofauti kubwa kati ya mkoa mmoja hadi mwingine: Utoro wa walimu ni: 58% mkoa wa Singida ukilinganisha na 17% mkoani Ruvuma na Manyara.