When I taught Grade 2 Data Management with the Ontario 2005 math curriculum, the biggest challenge was mastering the Venn Diagram. For many students, that was difficult enough, often taking up to two weeks before they were confident in their skill level. The surveys, tally tables, line plots, bar graphs, and pictographs were based on organizing and displaying data according to one attribute which were demanding enough. Now, as I read through the new Ontario Curriculum 2020 for Data Literacy and Probability, I am struck by the degree of difficulty that the Grade 2 student is expected to understand. The Venn Diagram is only a small part of it. How are we expected to teach it? Students are expected to use two-way tally tables, Venn Diagrams, and Carroll diagrams for collecting and organizing data. Line plots, bar graphs, and pictographs display two attributes instead of one. Students have to ask survey questions with two attributes such as 1) wha...