If you are a graduate student, this essay will require a thesis statement as topic sentences really don't cover a whole essay. For ideas, you need to think about what you consider an effective early childhood educator needs to be in order to work with small children. I would think a love of small children would be a must. Organization and attention to detail would be another because children need structure in order to function together in a group. Knowing the goals he wants to accomplish and setting up ways for the children to achieve them would also be important. Communications skills with parents are essential. Now, considering how long the paper must be, set up your thesis sentence sort of like this: An early childhood educator requires many skills to be effective with the children and successful as an educator. That way, you can use what you choose as required skills and discuss them as your body paragraphs.