Below is how the official curriculum organizes it. Each strand will get full lessons like the ones in Grade 1 Mathematics.
Whole numbers, decimals and fractions; multiplication and division with mental math and estimation
Pattern rules to predict terms; one-step equations with whole-number solutions
Length, volume and capacity; rectangles from a given area or perimeter; sort quadrilaterals; transformations of 2-D shapes
First-hand vs second-hand data; double bar graphs; likelihood of outcomes