http://irsenas.livejournal.com/ ([identity profile] irsenas.livejournal.com) wrote in [personal profile] irsenas 2016-10-28 07:31 pm (UTC)

ну так о них только педагоги и знают и сами с собой занимаются. А тут непосредственно тетради любой может взять и с детьми заниматься. Никакой научной тайны
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