Dance Central

Just know that this is the only "Passed these moves:" achievement that will pop if you simply play through all the songs on Easy.

Snake - Easy Bust a Move
Snap Groove - Easy Just Dance
Step Center - Easy Hey Mami
Step Side - Easy Down
Tap Front - Easy Hey Mami

Here's a little explanation of every move, for those who seem to be unable to pass it:
Snake Can be found on Hard "Jungle Boogie", or Easy "Bust A Move".
Umm... the idea is that you "snake". Move your head down with the leading shoulder moving down, at the same time move your leading leg. Then raise that shoulder, let your body snake back into a normal standing position and move your following leg. Repeat for the other side. The whole time your arms should be raised like you were skiing.
In "Jungle Boogie" you lead left for two beats before going right for the other two.
Snap Groove Can be found on Hard "Pump up the Jam", or Easy "Just Dance"
For each beat, your arms should be rotating towards you via the elbow (i.e. your left arm should be going clockwise). While doing so, do a left leg step, then together, then a right leg step, then together, on each beat.
Step Center Can be found on Easy "Hey Mami"
Step right with your right leg, then bring it back together, step left with your left leg, then back together. One on each beat. Keep your arms down.
Step Side Can be found on Easy "Down"
This is the same as Step Center, but you do not need to move your feet as far.
Tap Front Can be found on Easy "Hey Mami"
Step forward with your right leg, then bring it back together, step forward with your left leg, then back together. One on each beat. Keep your arms down.

Play through each of the following songs on Break it Down Easy (can be done on any mode but break it down gives you more chances to pass the move if you make a mistake) and make sure you pass the required moves. You only need to pass each move one time (get one green check). If you fail a required move, quick use your left hand to slow it down, perform it once and speed it up again. You will get 3 more chances to pass the move. The achievement will pop at the stats screen at the end of the song.

Jungle Boogie (Snake)
Pump Up The Jam (Snap Groove)
Hey Mami (Step Center)
Down (Step Side)
Hey Mami (Tap Front)

Update:

These moves can all be played in easy mode, thanks to Epsilon Theta and XI AlphaMale IX for the info.