Training using Manga textbook is one of the practical trainings to make learners study how to make advantage of their knowledge by discussing the contents among participants. The Manga textbooks have lots of embedded visual information, which enables us to make learners understand the situation without giving explicit hints to them. However, since the evaluation method in experimental learning has not been established yet, it is hard to give both instructors and learners enough feedback. To deal with this issue, in this article, we propose two novel methods: 1) "Network-Abstraction Method" to evaluate which information of the textbook was taken out, what relationships do learners discover and 2) "Persona-Conjoint Method" to evaluate how the information is interpreted.