Erin tiene un acuario nuevo. Primero, Erin pone cinco peces en el acuario nuevo. Luego, Erin pone seis peces en el acuario Nuevo. Por último, Erin pone nueve peces en el acuario nuevo. ¿Cuános peces pone Erin en el acuario nuevo? Demuestra todo tu razonamiento matemático.
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Several years ago, Connie Witt tried to implement a standards-based curriculum and grading system into her school district, Los Alamos. At that time, she received little feedback or enthusiasm from her colleagues. Nevertheless, she pushed on. Determined to turn things around, Connie purchased Exemplars with her own money and began to apply basic standards-based skills...
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