The Australian Curriculum v9 groups Years 1 and 2 as a band because students at this age develop at different rates, and the curriculum is designed to give teachers flexibility to respond to where their class actually is rather than where the calendar says they should be. The content statements and achievement standard describe what students should reach by the end of Year 2, allowing Year 1 to be used for building the foundations and Year 2 for extending and deepening. In practice, a well-structured program makes the two-year progression explicit, so teachers know what’s expected at each point in the band.