There are many resources on the matter. In particular there is an excellent website maintained by Toby Walsh with loads of links on on scientific writing, on presenting scientific articles, etc. http://www-/~tw/phd/
In Grade 6, instructional time should focus on four critical areas: (1) connecting ratio and rate to whole number multiplication and division and using concepts of ratio and rate to solve problems; (2) completing understanding of division of fractions and extending the notion of number to the system of rational numbers, which includes negative numbers; (3) writing, interpreting, and using expressions and equations; and (4) developing understanding of statistical thinking.
Example: The Narrative of the Life of Frederick Douglass discusses the relationship between education and slavery in 19th century America, showing how white control of education reinforced slavery and how Douglass and other enslaved African Americans viewed education while they endured. Moreover, the book discusses the role that education played in the acquisition of freedom. Education was a major force for social change with regard to slavery.
While they might not always ask for it, everybody appreciate some great humor, especially if it is being used as an introduction to a great article they need to read.