I have two types of experience, raw and modified. Raw experience is experience not modified for the level of the individuals receiving it. Modified experience is the amount of experience the character adds to their experience total. Lets say we calculate the party of 4 got 60,000 experience. First we would divide that by four to figure the raw experience each pc received. Then you modify that for any penalties for having levels that are not favored, then divide by the level of the character.
For example We have human ftr lvl7, human wizard/fighter levels 2/3, dwarven cleric level6, and a elf ftr2/theif4. They have a total of 60,000 raw xp among them. If the DM chooses to divide it evenly each gets 15,000 raw xp. The fighter get (15,000/ 7 (his level) for 2,413 net xp. The fighter/Wizard gets (15,000/5) or 3000 net xp, The dwarven cleric gets (15,000/6) for 2500 and the fighter thief first loses 10% because he has a non-preferred class more than one level away. This means he starts with 13,500 raw (13,500/6)=2,250xp
As you can see from the example above lower levels characters hanging out with higher level characters tend to get more xp. This is because they have more to learn and can learn it from the higher level characters. Now lets go off to the ways to gain xp
This is a perennial favorite of adventurers. The chart below will look familiar to many old timers. It is designed based off the model from first addition. It is a bit different, and before someone says "did you know this is not linear and seems to be somewhat random" I know, its my experience running and tweaking that made it look like this. If you don't like it change it.
|HD||Base XP||XP per hp||Special Ability||Exceptional ability|
|up to 1-1||5||1||2||15|
|1-1 to 1||10||1||4||20|
|1+1 to 2||20||2||8||30|
|2+1 to 3||35||3||15||40|
|3+1 to 4||60||4||25||55|
|4+1 to 5||90||5||40||80|
|5+1 to 6||150||6||75||100|
|6+1 to 7||225||7||125||150|
|7+1 to 8||375||8||150||200|
|8+1 to 9||600||10||175||250|
|9+1 to 10+||900||12||300||400|
|11 to 12+||1300||14||400||550|
|13 to 14+||1800||16||600||750|
|15 to 16+||2400||18||800||900|
|17 to 18+||3000||20||1000||1100|
|19 to 20+||4000||22||1250||1400|
|21 to 22+||5000||24||1500||1700|
|23 to 24+||6000||26||1750||1900|
|25 to 26+||7000||28||2000||2100|
|27 to 28+||8000||30||2250||2400|
|29 to 30+||9000||32||2500||2700|
|31 to 35+||10000||34||2750||3000|
|36 to 40+||11000||36||3000||3300|
|41 to 45+||12000||38||3250||3600|
|46 to 50+||13000||40||3500||3900|
|51 to 55+||14000||42||3750||4200|
|56 to 60+||15000||44||4000||4500|
|61 to 65+||16000||46||4250||4800|
By now the thief is say hey what about me, I defeat traps and such. Every trap you beat, every challenge you make you get 5xp per difficulty level raw xp. This does not include crafting items. So for example you find a trap that is DC20 to find and DC25 to disable, you get 100 XP (20x5) for finding it and if you disable it you get another 125 (25x5). Remember these are raw xp.
If a ranger successfully tracks something that need a track of DC30 they get 150 raw xp. Fighter needs a 15 to remain in the saddle then he can gain 75 (15x5) raw xp. On opposed checks the person only gets xp based on success and the level of difficulty their opponent gives them
A ranger is attempting to sneak by a troll. The troll rolls a spot of 22 but the ranger rolls a hide of 25 and a move silent of 28 he gets (22 (trolls spot)x 5 x 2 (two skills)=220 raw xp. There is no xp for taking 10 or 20. THis also limits the amount of xp one gets against insufficient foes. If bob has a +3 to spot, and Eddie the quick has +30 in move silent and hide he shouldn't get much for sneaking by bob.
Anything you make you get 1 xp per gp in value, with the exception of magic items. Use crafting rules. For example bob make a long sword worth 15gp he gets 15 raw xp. This is how commoners get more than one level.