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Grades 3–8 Academic Language Studio
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The Mystery Files · Case 02Key Use: ArgueELD-LA~20 min

The Salt-Stained Ledger

Harbor shipping ledger #12 came back with a crust of sea salt on page eight. Reconstruct the timeline before you blame the dock clerk. The path branches. What you ask, and what you do with the evidence, changes the ending.

The morning after the lantern case, Archive Keeper Jun Park discovers a white crust of dried harbor spray across page eight of the 1912 Wharf Ledger. Someone carried the book outside during the 5:30 p.m. squall and returned it before 6:00 p.m. Nia and Detective Voss must listen to the checkout log, inspect the weather slip, order the timeline, and write an evidence-based sequence report.

The Mystery Files

Communicative Objective

Students sequence an investigative timeline from multiple timestamps and argue which window of time accounts for the salt damage.

Bench: Sequence Builder

Story Cast in This Case

Nia Calder

Nia Calder

Student investigator

Detective Omar Voss

Detective Omar Voss

Case lead

JP

Jun Park

Archive keeper

Target Academic Vocabulary (6 Terms)

timeline: an ordered record of events showing what happened first, next, and last
residue: a thin layer of salt or grit left behind after water dries
interval: the period of time between two recorded events
verify: to confirm a time or detail using a written record
conclude: to reach a reasoned judgment supported by the timeline
alibi: proof that a person was somewhere else when an event happened
Session Setup

Choose Grade Band & Support Pathway

Grade band

Recommended for grades 6-8. The other band has its own text.

Support pathway
Adjust one domain independently

Support pathways are classroom choices. They are not WIDA scores.