7,109 chat-format samples (6,989 train / 120 val) from 1,800 programmatically constructed lessons across 8 diagram families and 78 distinct topics (plots, geometry, flowcharts, comparisons, arrays, trees, timelines, concept maps). Every lesson is validated raw by Kiwi's geometric overlap checker — zero overlapping elements, nothing off-board… See the full description on the dataset page: https://huggingface.co/datasets/peekaboo10/kiwi-whiteboard-lessons.