The Xplorer Squads map set has been created as an educational tool to support the lesson package Unlock the Past. The maps are not historical evidence themselves but are designed to help students and teachers read, compare, and interpret the historic area of the lower part of Rattanakosin in Bangkok.

The maps specifically cover an area where fifteen selected historic places are located: Tha Tian Market, Saranrom Park, the Clock Tower (replica), Charoen Krung Road, Sala Chalermkrung Royal Theatre, The Old Siam Plaza, Poh-Chang Academy of Arts, Suankularb Wittayalai School, Metropolitan Electricity Authority (Wat Liap), Phra Phuttha Yodfa Bridge, Rajini School, tram line (no longer existing), Prince Theatre (no longer existing), Phra Ratchawang Police Station, and Museum Siam (formerly Ministry of Commerce).

Teachers use these maps for place-based education. They begin with the present-day map adapted from Google Maps. Students play a Pin the Place game by following clues, searching digitally and on the printed map to correctly locate and name the places. After the game, they learn how to read the maps properly. We conduct a dedicated two‑hour map‑reading session, during which students practise observing and noting details layer by layer. They compare the maps from different periods to build their understanding of historical change and interpretation.

Teachers guide students with an activity template and magnifying glasses to observe symbols, signs, and changes near the assigned places. Students work in groups to answer questions about design, materials, complexity, historical context, and changes in land use. Through their own observations, digital searches, and group discussions, they construct their knowledge collaboratively, interpreting how the area evolved over time.

In earlier sessions, Museum Siam provided printed maps in different materials: the 2568 BE and 2475 BE maps on A3 paper, and the 2430 BE map on tracing paper. These materials allowed students to handle and layer the maps, helping them to observe existing features and changes over time more effectively. Teachers and educators are encouraged to adapt the method and create their own versions for other areas of Bangkok or even other cities.