The Mystery Files · Case 02Key Language Use: ArgueELD-LA · Language for Language ArtsAbout 20 minutes · Recommended grades 6-8
The Salt-Stained Ledger
Students sequence an investigative timeline from multiple timestamps and argue which window of time accounts for the salt damage.
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Standards Architecture
WIDA alignment for practice
Aligned for classroom practice to the WIDA English Language Development Standards Framework, 2020 Edition. This is not an official WIDA score, ACCESS score, or proficiency level.
- Standard: Language for Language Arts
- Key Language Use: argue
- Discourse: A chronological investigative argument that narrows a time window using checkout and weather timestamps.
- Sentence: Temporal and causal clauses using between, after, before, because, and therefore.
- Word and phrase: timeline, residue, interval, verify, conclude, alibi, 5:15 p.m., 5:45 p.m.
Instructional Guidance
Teaching notes
About 20 minutes. Recommended grades 6-8. Content area: language-arts.
Lesson Objectives
- Construct a precise chronological argument from timestamps.
- Rule out an unverified suspect by comparing checkout times with weather data.
Pathway ScaffoldingGuided pathway provides chronological frames and a timeline word bank. Developing pathway offers optional starters. Independent pathway adds the harbor master's wind-gauge log.
Likely language demands
- Students may cite the salt stain without linking it to the 5:30 p.m. harbor squall timestamp.
- Students may list times out of order without using sequence markers.
What independent performance looks like
Independent performance sequences all three timestamps, cites the 5:30 p.m. wind gust, and clears the morning clerk without frames.
Follow-up
- Language Arcade: Observation, Inference, or Rumor? (/arcade), then Science City Case 1.