Tests taken before, right after, and well after the activity show where the Kit-Build advantage actually shows up.

A reading exercise is easy to finish and easy to forget. The study behind this paper asks a sharper question than whether students understood a text on the day. It asks whether the way they worked on it changed what they still knew later.

Students learning English as a foreign language worked in pairs on the same reading material. One group rebuilt a concept map from a supplied set of parts, the collaborative Kit-Build condition. The other group composed an open ended map from scratch. Everyone took the same comprehension tests: one before the mapping activity, one immediately after, and one later to check retention.

The tests separated two kinds of question. In-Kit questions covered content contained in the parts that students received. Not-In-Kit questions covered content from the same reading that the kit did not include.
The delayed test adds nuance. Students who had scored higher right after the activity also scored higher later, and the analysis suggests the retention gap traced back to that immediate understanding rather than to the teaching method by itself. The method matters because it produces the understanding in the first place.

The finding carries a practical warning as well. Because the kit defines the content, students get better at what the kit contains. Anything left out of the parts, and therefore outside the reconstruction task, gains no measurable advantage. Teachers who adopt the approach should decide deliberately what belongs in the kit.
Pinandito, A., Hayashi, Y., & Hirashima, T. (2021). Online Collaborative Kit-Build Concept Map: Learning Effect and Conversation Analysis in Collaborative Learning of English as a Foreign Language Reading Comprehension. IEICE Transactions on Information and Systems.