Ok,
So our whole team consists of newbies. I was wondering if it is better to use individual motors for each wheel or use one motor for two wheels and use gears to connect them.
Currently, we are using one motor per wheel, however, while programming only 3 wheels moved, 1 in which moved 3 times slower than the others. We are considering trying to use only two motors and gears, but that would mean we would have to take our whole robot apart.
Any suggestions? 
Two motors on the wheels won’t give you enough power to move your robot (if it’s relatively heavy)
Are your motors directly driven to the wheels ? If they are, your problem is either in the code or you have a faulty motor
Ok, thank you! 
When I was first starting out with my team of newbies, we started with two motors on the drive with, like you described, gears connecting the wheels. We didn’t get very far with that robot.
I would suggest that you stick with the four motor drive (I’m assuming you have four wheels) and check for issues with the programming or maybe excess friction on the slower wheel. Try switching motors if it still doesn’t work.
Good luck!
You mean 2 motors on each side, not 2 motors total. Gearing the motors together will not fix your problem. First, find out if all the motors are the same type (393,269,3-wire, something else). If they are 393 motors, check the internal gearing. 393 motors can be in either torque or speed internal gearing. If that doesn’t solve it try checking your code, the individual motor running from a different motor controller, or a different port on the cortex. Or try a new motor.
If you are a totally new team, I would highly suggest a four motor drive with wheels individually powered. If you can keep your robot light, speed motors will give you a huge advantage. I would never go with less than four on a drive.
If one motor isn’t working, check your code, check the motor, check the wires, and check the port on the cortex for failure.
Off Topic:
Your name is TXVEX, are you from Texas? Just curious, I’m from Galveston.