@inproceedings{oai:soar-ir.repo.nii.ac.jp:00018685,
 author = {Miyazaki,  Mikio and Fujita,  Taro and Jones,  Keith},
 book = {Proceedings of the 12th International Congress on Mathematical Education (ICME-12)},
 month = {},
 note = {Article, Proceedings of the 12th International Congress on Mathematical Education (ICME-12)．COEX, Seoul, Korea, 2012-7-8/15, 2012, 2858-2867．},
 pages = {2858--2867},
 publisher = {ICME},
 title = {Introducing the structure of proof in lower secondary school geometry: a learning progression based on flow-chart proving},
 year = {2012}
}