The pie chart illustrates results of a survey causes of poor learning from institutions in a certain Country .
overall unskilled teachers is the main cause covering 35% even though it is the most high there is the lowest cause which is lack of revision.
In 2011 the more popular cause of poor learning was unskilled teachers followed by ubringing which covered 27% .Whereas 20% was caused by working parents to help the institution run smoothly it was then followed by 10 % of poor facilities and the least was lack of revision .
In summary the teachers must be well skilled before employed because it is the most high cause of poor learning.
