If viewed as multiple homogenous groups, then the students considered assigned to each grouping can work on different worksheets as they have shown mastery over the previous steps

Alternatively, students may be a worksheet ahead. For example, the lower ability group are working through recognising speech punctuation, whilst the middle group are working on the 'using speech punctuation' worksheet, and the higher group are working on the 'direct or indirect speech' worksheet having shown mastery over the previous worksheets/concepts