recently i notice my boy ( pri 3 ) cannot focus or like very easy forget thing . or i can say easily get distracted by the thing surround him. and even learn chinese spelling had revise with him 2 day. but when he return home with the chinese spelling book i notice quite alot of missing word .which he say very hard. but he was not like that pri 1/ 2 or even the 1st and 2nd term of pri 3 . sorry to ask is there any way or supplements that can boost his memory all that.