They examine a variety of items from newspapers, magazines, and other sources that relate to changing situations. Students make charts and line graphs to show changing speed, changing heights of plants, and changing population. They interpret a variety of graphical shapes, describing in words how the graphs relate to the situations. Students continue to build on their understanding of multiplication and division, extending concepts and skills studied earlier in the year in Arrays and Shares . Using Array Cards, students make multiplication tables and look for patterns in their tables.
Students discuss strategies for estimating and solving double-digit multiplication problems.
They use 300 charts, rectangular arrays, cubes, calculators, and games to find factors of large numbers and solve multi-step problems that represent both multiplication and division. Students name and locate points on a coordinate grid with ordered pairs of numbers, both positive and negative. They play Sunken Ships, identifying points on the grid and using distance feedback in their strategy for selecting a next possible location. Students discuss properties of rectangles and write rectangle procedures for the computer using Geo-Logo. They place rectangles symmetrically on a computer bulletin board.