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Knight Lines is a game based on a 1962 board game called Twixt (now out of print).

Knight Lines is played on a square grid, using two colored markers, as shown.  Player 1 has to connect the red sides of the gameboard, while player 2 has to connect the blue sides. All moves are knight's moves from one corner (vertex) to another. The routes are not permitted to cross.

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In observance of Pi week (Pi day is March 14 -- 3.14), we had the children discover Pi as the ancient Chinese (3), Babylonians (25/8), Egyptians (256/81), and the Greeks (3.1485) did.

This week, we embarked on a new journey working with integers with all operations including addition, subtraction, multiplication, division, parentheses, and exponents.

The attached pdf has detailed explanations of each operation.  Each Mathlete should try to complete the riddle puzzle and additional worksheets to the best of their ability.

This may be a great opportunity for parental guidance.

In the 1st and 2nd grade classes this week, we reinforced the notion that subtraction really is addition. For example, 12-8=4 is the opposite as 8+4=12; 101-98 is really the same as 2+1=3.  What do we have to add to 98 to get to 101.  Also, 85-48 is 2+30+5=37.

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Also, we worked on subtraction as compared to negative numbers. For example 11-7=4 is the same as -7 + 11 = 4. 

There is a detailed explanation of these concepts in the attached pdf as well as additional practice.