Sonmi investigates Fighter's terrarium at night

Sonmi Gecko Mystery · Part 4

The Night Terrarium

Fighter is safe, but five clues show that something went wrong during the evening care routine. Read, listen, reason, and write the final case report.

A2-B160-90 minutesListening + deduction
Open the case file

Lesson route

Eight case stages

0/8 complete

Stage 1 · 5 min

Warm Start: Night Detective

Discuss these questions before opening the case:

  1. 1. What do geckos usually do at night?
  2. 2. What should a caretaker check before leaving?
  3. 3. Which clue in the hero image looks important? Why?

Vocabulary

Case Words

terrarium

a glass home for reptiles or amphibians

humidity

how much water is in the air

misting

spraying water lightly

shed skin

old skin that a reptile leaves behind

nocturnal

active at night

ventilation

air moving in and out

hide box

a small safe place where a gecko can rest

evidence

information that helps prove what happened

Stage 2 · 10 min

Case Brief

At 8:20 p.m., Sonmi enters the science room for the final animal check. Fighter is not on his usual branch. The terrarium looks different, and the evening care log may not tell the whole story. Sonmi has fifteen minutes to decide what happened and make the habitat safe.

Where is Fighter?
What went wrong?
What must Sonmi do first?

Stage 3 · 15 min

Listening Log

Teacher: read the case recording twice. First, Sonmi listens for the main problem. Second, she writes four details.

Stage 4 · 15 min

Evidence Board

Select the three clues that best prove the evening care routine failed. Be ready to explain your choices.

Stage 5 · 15 min

Grammar Lab: Must, Might, Could, May

must

very strong conclusion

might / may

possible explanation

could

one possible reason

Stage 6 · 10 min

Witness Interview

Role-play: Sonmi interviews the evening caretaker. Ask all five questions, then answer as the caretaker.

  • When did you last see Fighter?
  • Did you mist the terrarium?
  • What did the humidity meter show?
  • Did you check every lid clip?
  • Why was the spray bottle still full?

Stage 7 · 15 min

Final Case Report

Write 120-160 words. Include the problem, at least three clues, two modal verbs, your conclusion, and a four-step action plan.

0 words

Stage 8 · 5 min

Teacher Check