The idea that assessment is intrinsic to effective instruction is traced from early experiments in the individualization of learning through the work of Benjamin Bloom to reviews of the impact of feedback on learners in classrooms.
Incidental hypervascular lesions are also very common findings in liver imaging. It is important to differentiate between 'touch' and 'don't touch' lesions. Benign 'don't touch' hypervascular tumors include hemangioma, FNH and small adenomas.
Lesion. A lesion is any abnormality in the tissue of an organism (in layman's terms, damage), usually caused by disease or trauma. lesion n 1: any visible abnormal structural change in a bodily part 2: any break in the skin or an organ caused by violence or surgical incision [syn: {wound}].