In my quest to create a series of mountain biking “competencies” (tests to show if you have mastered a skill) here is a wheelie and weight shift competency (see post titled: Ways to test your mountain biking skill and monitor progress in mtb skill).
Here is a great video of clearing a rock using two basic skills, a wheelie and weight shift. This is the exact same skill to get over a small curb correctly just done on a larger obstacle. Remember, always use “baby steps” when progressing a skill! It is much better to gain confidence through a series of victories than risk injury and/or a big failure that can set you back mentally.
If you can clear a 36″ rock with 12″ square edge at the bottom you have mastered the wheelie and weight shift (although there are definitely larger rocks on some trails if you can clear a 36″ rock you have the skill for a much bigger rock, you just need to work your way up).