Write an explanation with a thesis, structure and useful graphics

Learning goal: Establish an explanatory thesis and develop it with relevant facts, definitions, examples and an appropriate structure. Use precise vocabulary, transitions and a graphic to help a reader understand the topic, then conclude from the explanation provided.

An explanatory text helps a reader understand how something works or how ideas relate. Its thesis presents the central explanation rather than an opinion about which policy should win. “A waiting-work total changes through both incoming and completed work” establishes the relationship this lesson's model essay will explain. “The staff should hire another worker” would shift to an argument about a decision and require different evidence.

Begin by identifying audience and prior knowledge. A younger reader may need backlog defined immediately. A technical audience may know that term but still need to know which movements the model counts. Clear explanation does not mean removing every specialized word. It means introducing useful vocabulary and providing enough context to use it accurately.

Choose an organizational strategy that fits the concept. Definition explains what a term means. Classification groups examples by a stated criterion. Comparison shows similarities and differences. Cause and effect explains how one change contributes to another when the relationship is supported. A process sequence follows steps or stages. An essay can combine strategies, but its sections should develop one central purpose rather than become a list of unrelated forms.

The simulated library system supports a definition followed by a process relationship and a numerical example. Backlog is the number of returned books still waiting to be shelved. New returns add to that number; shelving removes books. Within the simplified model, no other transfers occur. State that assumption, because books sent for repair would require an additional outflow and change the explanation.

Relevant content develops the thesis. A numerical example shows the relationship in use; a definition clarifies a key word; a comparison between two days reveals why the final cart count alone is insufficient. The color of a librarian's coat does not help explain this model unless another aspect of the topic makes it relevant. Select details for their contribution, not merely to increase length.

A graphic should clarify a relationship that prose alone may make harder to follow. The diagram starts with 20 waiting, adds 40 returns and removes 35 shelved to end at 25. Its + and − signs show how each quantity changes the count, and = shows the result; the boxes are not physical distances or stages of elapsed time. A caption identifies the units and assumption. Refer to the graphic in the text and explain what the reader should notice; an unexplained decorative image does not develop the topic.

Formatting and multimedia can also aid comprehension, if needed. Headings tell a reader what each section explains; a longer version of the model could use What a backlog is, How the count changes and What the record does not show. A table can present several days' counts more compactly than a paragraph. In a digital explanation, a short audio or video clip belongs when it meaningfully helps the reader understand, for example by showing something the words and diagram cannot, such as how a book moves from the cart to a shelf, or by demonstrating a step the text already describes; a clip added for decoration gives the reader extra work. A short piece may need none of these, and the writer should be able to say why.

Precise transitions signal relationships. Initially introduces the starting condition; during the period locates the flows in time; because connects the net increase with more arriving than leaving; in contrast can compare a day with the opposite balance. Do not use then if the model only reports totals for the day and does not establish whether all returns arrived before all shelving occurred. Total-count arithmetic does not prove the exact order of individual events.

Original model explanation — Reading a Waiting Total. A return-cart backlog changes through incoming books and completed shelving, so its final size cannot be understood from either flow alone. In the following simulated day, the cart begins with 20 books waiting. Forty more arrive, and the team shelves 35.

Backlog names the work still waiting at a stated time. Returns increase it, while shelving decreases it. The diagram represents the daily balance: 20 plus 40 minus 35 equals 25. The cart ends with five more books than it had initially because arrivals exceed completed shelving by five. The arithmetic summarizes the period; it does not claim that every arrival preceded every removal.

This model assumes no books leave for repairs or enter from another holding area. If those movements occur, the record must include them. It also gives counts rather than time per worker or placement accuracy. Those questions would require additional information.

The waiting total is therefore a result of tracked movements under stated assumptions. Reading the starting amount together with additions and removals explains the ending backlog more clearly than judging the cart's appearance alone. The model answers a count question while preserving the limits of what was measured.

The grade-specific expectations for this writing type are the explanatory expectations taught above: a clearly introduced topic, related information organized into sections, relevant facts, definitions and examples, transitions, precise language, a formal style and a concluding section. Judge whether the draft is clear and coherent against those expectations, for this task, purpose and audience. Editing for conventions means applying the grade 6 Language standards you have studied: pronouns in the proper case with clear antecedents and no unintended shifts in number or person, commas, parentheses or dashes around nonrestrictive elements, correct spelling, and a style suited to the task (formal for an argument or explanation, the narrator's voice for a narrative) kept consistent from start to finish.

Worked development: Weak draft: “The backlog changes. There are many books. Libraries are useful.” The last two sentences do not explain the change. Add a definition and an example: “Backlog means books waiting to be shelved. With 20 initially waiting, 40 arriving and 35 shelved, the end count is 25.” Then explain why the difference is five. Development requires a connection between facts and the thesis.

Worked graphic reference: “See the picture” gives little guidance. “The diagram combines the starting 20 with 40 arrivals and subtracts 35 shelved, so the ending count is 25” directs attention to the relationship. A useful graphic caption also clarifies that all quantities count books in the same simulated period.

Worked formal precision: Replace “The cart exploded because everyone dumped stuff” with “The backlog increased because more books arrived than were shelved during the period.” The revision avoids an inaccurate literal image, an unsupported claim about everyone and an imprecise noun. A lively metaphor may suit another purpose, but this explanation needs exact quantities and relationships.

Planning task: Select an explainable process from a supplied lesson or a directly observed classroom activity. State what the reader should understand in one sentence. Choose a structure, list the relevant definitions and identify what evidence each section needs. If using the library example, keep its simulated status and assumptions explicit. If using a real process, record observations and consult an appropriate source instead of inventing measurements.

Independent performance: Write a 400-word explanation with an introductory thesis, logically ordered sections, definitions, concrete details, meaningful transitions and a concluding section. Include one useful original diagram or table with a caption and refer to it in the prose. Ask a peer to explain the process using only your draft; record a point of confusion and revise the corresponding section. Check that the conclusion follows the explanation and that every quantitative statement uses consistent units and supported values.