For an informal grading, bring it to a coin dealer for an on-site appraisal. For an official grading, it needs to be sent into a professional grading service.
The Seventh Coin - 1993 is rated/received certificates of: USA:PG-13
5 Sides of a Coin - 2003 is rated/received certificates of: USA:TV-PG
Le coin tranquille - 1957 is rated/received certificates of: Sweden:15
The Black Coin - 1936 is rated/received certificates of: USA:Approved USA:Passed (National Board of Review)
Au bistro du coin - 2011 is rated/received certificates of: France:U
Silver dollars are "rated" on a scale of 1 to 70. 70 is the best possible grade. If a coin is graded in MS70 it means that there is absolutely no ware on the coin. G4 is almost the worst grade. If a coin is in G4 it will be very worn, no longer shiny and many of the smaller features will be gone.
Coin Jam Episode One - 2011 V is rated/received certificates of: USA:G
Mad About You - 1992 The Coin of Destiny 6-16 is rated/received certificates of: Argentina:Atp
White Collar - 2009 Flip of the Coin 1-4 is rated/received certificates of: Netherlands:6
Pan Am - 2011 One Coin in a Fountain 1-5 is rated/received certificates of: USA:TV-PG
Coins are graded by experts, who look at how much wear is on the coin, and whether is was properly struck when it was made.
Smurfs - 1981 To Coin a Smurf Smurfette Unmade 7-21 is rated/received certificates of: Australia:G