insufficiency

"There was a shortage of pencils in the classroom, so students had to share. "

"His recent lack of focus in class showed a worrying moral failing. "

"I went to the park because the weather was nice. "

"The school is located five miles of the town center. "

"They brought their books with them."

"It looks weaker and weaker, the more I think about it."

"supply and demand"

"My stomach rumbled loudly; I was very hungry after a long morning of school. "

"The student's performance showed a clear inadequacy in understanding the material. "

"The food provided at the school cafeteria ensured the sufficiency of nutrients for the students' needs. "

"The children went to school this morning. "

""A large troops of excited children ran onto the playground during recess." "