# Summer SAVY 2018: Session 1, Day 2 – Secrets of the Moli Stone (Rising 2nd)

Posted by on Tuesday, June 12, 2018 in Grade 2, SAVY.

Happy Second Day!

The students expressed great enjoyment playing the Card Game Capers; therefore, they began the day by playing a few rounds of the game with a group of their fellow mathematicians. They created another level of fun and challenge by giving one point to the mathematicians who were able to generate the largest number in each round. Afterwards, they discussed and shared their strategies with each other. In order to allow students the opportunity to make generalizations about the theme of “patterns”, students were asked to predict how many two-digit numbers were possible using the digits 0-9. They were encouraged to think/work independently to record all possibilities before partnering with another mathematician and finally sharing with the whole group. The students are beginning to learn that patterns have segments that are repeated, allow for prediction, have an internal order, and are enablers.

The students knew a lot about number sentences. For example, they understood that the answer to an addition problem is known as the sum, while the answer to a subtraction problem is known as the difference. They were surprised to learn that the number in a subtraction problem that gives you the total amount before anything is subtracted is the “minuend’. For example, in 5-2=3, 5 is the minuend. They were also introduced to the advanced concept of “subtrahend”, the number in a subtraction problem that gives the amount that is subtracted. For example, in 5-2=3, 2 is the subtrahend. The students finished the day by adding and subtracting within 1000 using strategies and algorithms based upon place value, properties of operations, and/or relationship between addition and subtraction.

Dr. P.