How can one be successful in a pre-algebra course/class?

To successfully pass a pre-algebra course, you need to have mastered basic arithmetic and geometry skills. If you have these two covered, you'll be good.

What age group(s) does Early Childhood Education comprise?

Those pursuing coursework in Early Childhood Education should be prepared to work with children as young 3 or 4 (Preschool) and as old as 8 or 9 (3rd grade). Most school systems consider ECE to be K-3.

What levels of instruction should an ESL student focus on during tutoring?

I believe those areas would be practical vocabulary, basic language structures and the essentials of reading, writing, listening and speaking.