Library Learning Commons

Supports the development of such fundamental topics as place value, compensation and equivalence, addition and subtraction on the open number line, and the efficient use of the five- and ten- structures. Unit books each comprise a 2-week sequence of investigations, games, and minilessons that fostser a deep conceptual understanding of essential mathematical ideas. Yearlong resource guides provide strings of related problems that develop students' deep number sense and expand their repertoire of strategies for mental artithmetic.

Overview book. Investigating number sense, addition, and subtraction, grades K-3 / Catherine Twomey Fosnot. Unit books. Bunk beds and apple boxes: early number sense / Catherine Twomey Fosnot -- Beads and shoes, making twos: extending number sense / Madeline Chang, Catherine Twomey Fosnot -- The double-decker bus: early addition and subtraction / Maarten Dolk, Nina Liu, Catherine Twomey Fosnot -- Measuring for the art show: addition on the number line / Catherine Twomey Fosnot -- Organizing and collecting: the number system / Nina Liu, Maarten Dolk, Catherine Twomey Fosnot -- The t-shirt factory: place value, addition, and subtraction / Catherine Twomey Fosnot -- Ages and timelines: subtraction on the open number line / Catherine Twomey Fosnot -- Trades, jumps, and stops: early algebra / Catherine Twomey Fosnot, Patricia Lent.Mathematics in the City. Resource guides. Games for early number sense: a yearlong resource / Catherine Twomey Fosnot, Antonia Cameron -- Minilessons for early addition and subtraction: a yearlong resource / Catherine Twomey Fosnot, Willem Uittenbogaard -- Minilessons for extending addition and subtraction: a yearlong resource / Catherine Twomey Fosnot, Willem Uittenbogaard. Read-aloud books. The sleepover / Catherine Twomey Fosnot -- Grandma's necklaces / Catherine Twomey Fosnot -- The double-decker bus / Catherine Twomey Fosnot -- The Masloppy family / Catherine Twomey Fosnot -- Measuring for the art show / Catherine Twomey Fosnot -- The Masloppy family goes to New York City / Catherine Twomey Fosnot -- El bisabuelo Gregorio / Catherine Twomey Fosnot -- Grandma Eudora's t-shirt factory / Catherine Twomey Fosnot.