And refers to the learning environment of children with maturity. Previous experience and motivation to the point where one can get into the things you have been taught and the teachers there.
Ready to learn the child's condition means that there are maturity. Experience and motivation to one point that can recognize new things or are ready to receive instruction from the teachers themselves.
with the state of the study means that the children are coming of age experience and motivation, and original to the point of the new things that can be perceived or ready to receive instruction from a teacher.