Expository writing essay before you start, note that good expository essays are characterized by the following conditions: the essay starts with a thesis statement that is supported and discussed in the rest of the composition. the essay presents a series of logically connected ideas that are supported by relevant details. the essay follows a clear organizational pattern. objectives draft an expository essay incorporating a strong thesis statement and coherent ideas apply appropriate transitions to writing it doesn't matter how many words just like a paragraph or two.

As I do not know the topics you are using I will provide an outline for you to work on with any topic. 

The essay should include 5 paragraphs approx 
1. Introduction:  you can write general information about the topic you selected. and you provide the thesis statement at the end of this part. For example, "Explanatory essay  are necessary to practise how to support ideas"
2- 3 -4 : in these paragraphs, you are going to support your thesis providing an argument for it . "you need to plan and organized ideas" "you should research for information in reliable sources)" " make clear statements for everyone to read it/ make your points clear" 
5. conclusion: you have to go over your ideas, explain them briefly and round up the topic. You should not include new information in this section.