Fourth- and fifth-grade learners can use differentiated number sets within CGI problem structures to add and subtract fractions with unlike denominators.

Contributor Notes

Katherine A. G. Phelps, katie.phelps@orange.k12.nc.us, teaches fifth grade and grades 4–5 combinations at Efland Cheeks Elementary School in Efland, North Carolina. She is interested in using high-cognitive-demand problems and student discussions in the math classroom.

(Corresponding author is Phelps katie.phelps@orange.k12.nc.us)
Teaching Children Mathematics

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