Academy · France · CE1 · Mathematics
Le Secret du sentier englouti
The path to the observation hut has disappeared underwater. Read the map, compare distances and help Romy and Adam discover what changed in the woods.

The story
A mystery to solve
Romy et Adam connaissent le petit bois des Saules. Avec Simon, qui accompagne leur club nature, ils aiment rejoindre la cabane d’observation. Depuis ses fenêtres, on voit les oiseaux se poser près du ruisseau. La semaine dernière encore, le sentier passait entre les herbes, juste avant la cabane. Aujourd’hui, Adam s’arrête au carrefour du grand chêne. Une flaque occupe le chemin. Puis les enfants aperçoivent de l’eau plus loin, entre les arbres. Le sentier disparaît dessous. Un petit étang recouvre maintenant le passage. « Il n’y avait pas toute cette eau ! » dit Romy. Simon leur demande de rester avec lui sur le sol sec. Le ruisseau est toujours là, mais quelque chose a changé dans le bois. Comment l’eau a-t-elle pu recouvrir le sentier en quelques jours ?
See 6 sample pagesInside the pack
What children practise
- Additionner les parties d'un trajet.
- Comparer des longueurs et des totaux.
- Choisir les données utiles et les unités.
- Vérifier un résultat et expliquer sa démarche.
Learning scope
Curriculum and level
Selected CE1 practice for the French school system in 2026–2027. This booklet complements classroom work and does not cover the full curriculum.
Source guidelines
Formats and delivery
What does the digital PDF include?
28 pages in A4 + US Letter, with six missions and adult answers. Download the files through Gumroad and print them at home. This purchase does not include a physical book or shipping.
Three teacher documents included with the PDF
Alongside the illustrated book, this Academy PDF pack includes three separate classroom documents, all in French:
- The story and reading texts, without the activity questions.
- Illustrated questions and activities, with space for pupils to respond.
- A teacher guide with hints, worked answers and PER curriculum references.
The two pupil documents use Century Gothic 12 with generous spacing. These documents accompany the digital PDF purchase; they are not included with the printed book.
How is the printed book different?
The printed edition is a separate A5 colour paperback with 40 pages, ordered through Lulu. Its pagination differs from the PDF. Shipping charges and delivery estimates are confirmed by Lulu at checkout.
MystMind
Ready to begin?
Try the first mission for free, then get the complete printable adventure.



