Ability tracking : Ability tracking refers to the educational practice of grouping students according to ability and then educating them in classes with students of comparable educational or intellectual standing. It is a school procedure in which students are grouped by IQ or academic achievement and then taught in classes made up of students of comparable ”ability.”
means . Moreover, Ablation is the surgical destruction or removal of tissue, an organ, or a precise region of a particular structure. Ablation may involve surgical cutting (excision); chemical destruction, such as injection of phenol; or the use of high frequency electrical current or radio waves. For example, pallidotomy is a procedure used in the treatment of Parkinson's disease or certain other movement disorders. The procedure involves surgical ablation of part of the internal portion of the globus pallidus (GPi)--i.e., a brain region involved in regulating movement--in an attempt to "rebalance" movement and posture control. Once a wire probe is inserted into and precisely positioned within the GPi, it heats and destroys adjacent tissue through the emission of radio waves. This is usually done in experiments on animals, to determine the function of a particular area. Ablation is also called Lesioning.