The invention is directed to a method for improving learning and/or memory (e.g., auditory, visual, somatosensory or motor) in adults and children of an age which is beyond the early critical period for learning, said method comprising inhibiting (i) ecto-5′-nucleotidase (Nt5e, aka CD73) or (ii) A1 adenosine receptor (A1R, aka Adora1) expression or function in the brain. The invention is also directed to a method for treating learning and memory defects and neurological diseases associated with an abnormal auditory, visual, or somatosensory perception by inhibiting Nt5e or A1R expression or function in the brain.