Get twelve people in a lobby, and explain how the level boosting is going to work. Next, kick six people out so there are only six in your party. Then, find a Search And Destroy game. Note: While trying to find the game, make sure the host (the person trying to find the game) temporarily has a bad connection so it will make you host the lobby and not pair you with someone else. Once you are in the lobby, you can invite the other six people to join. When all the spots are filled, you can make your connection good again and begin the match. Choose a class with the riot shield. It is recommended both players use the One Man Army perk if you have unlocked it. Once the match begins, find another player, and have them keep shooting you while you hold the riot shield to block the bullets. You will get +500 experience points every few seconds five times. Once you start only getting +100 experience points, switch classes and have the other player switch to a riot shield class. Do the same things to them until they only get +100 experience points, and then switch back. Repeat this as many times as desired. It is possible to get over 50,000 experience points per match if done correctly. Note: To keep the game going as long as possible, make sure one team plants the bomb and then the other team defuses it.