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Muuttuja-sarjassa nähdään tulevaisuus!

Viimekertaisessa blogikirjoituksessani lupasin, että me Sanoma Prolla haluamme omalta osaltamme tukea materiaaleilla opettajia työssään, jotta nuorten matematiikan taidot saataisiin jälleen nousuun. Näistä lähtökohdista sai alkunsa uusi yläkoulun matematiikan Muuttuja-sarja. Erityisesti