How do you know you have the right answer to a problem? Prove it! Simple, yet engaging text and colorful images introduce readers to the importance of finding patterns, recording facts, making observations, and more.

© 2020 Capstone Press (دفتر الصوت ): 9781543523218

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دفتر الصوت : ١١ جمادى الآخرة ١٤٤١ هـ