 Badanaa maktabada ama jaaliyadaha iyo ururyada kala duwan ayaa waxeey sameeyaan howlo kala duwan si eey kaaga caawiyaan sidii aad si fudud kusoo gali laheyd mujtamaca iswiidhishka ama sidii aad tababar ugu sameyn laheyd luqadda iswiidhishka. 