Hello

How to explain to students the difference between may, might and could when it comes to possibility?

http://www.google.com/webhp?rlz=1C1GGGE_enUS379US379&sourceid=chrome-instant&ix=seb&ie=UTF-8&ion=1#hl=en&rlz=1C1GGGE_enUS379US379&output=search&sclient=psy-ab&q=difference%20between%20may%20might%20and%20could&pbx=1&oq=&aq=&aqi=&aql=&gs_sm=&gs_upl=&fp=277de88f3b68c9dc&ix=seb&ion=1&bav=on.2,or.r_gc.r_pw.r_cp.r_qf.,cf.osb&biw=1344&bih=570

There are some good explanations here, especially in the first 3 or 4 links.