Countries that have large needs or education would be countries that have laws against education for all or certain people.
Here are the top ten least educated countries- From highest to lowest
10.Senegal
9.Mozambique
8.Ethiopia
7.Sierra Leone
6.Benin
5.Guinea
4.Niger
3.Chad
2.South Sudan
1.(lowest education rate in the world) Burkina Faso
Hope this helped :D