There are many excellent elementary schools in Ellicott City. That being said different parents want different things for their children. There are good and bad teachers in every school. As a parent of a child getting ready to go into Kindergarten I have put more weight on what the other parents are saying about their experiences with the school. Reading the parent reviews is a great way to gauge if that is the school that you want for your child.
www,greatschools.org rank the schools by many factors. You can also compare schools. The howard County school website is also a great tool to see if a school meets your needs.