<p>The activity is a substitution tournament. Students generate values to substitute into algebraic expressions. The expression which repeatedly has the highest value is the winner.<br /> I found the substitution tournament useful for encouraging students to practise substituting values into an algebraic expression.<br /> The game works well when it is played in pairs.<br /> The game aspect encourages the students to talk about the process of substitution and to make decisions.<br /> Before the students begin playing, I usually ask them to look at the expressions and put a mark next to the one they think will win. This can generate a good discussion after the game has finished.<br /> Extension: Give the students 2 different coloured dice. Tell them that one colour is positive, the other is negative.<br /> Extension: Give students a 10 sided, 0 to 9, die.</p>

<p>The activity is a substitution tournament. Students generate values to substitute into algebraic expressions. The expression which repeatedly has the highest value is the winner.<br /> I found the substitution tournament useful for encouraging students to practise substituting values into an algebraic expression.<br /> The game works well when it is played in pairs.<br /> The game aspect encourages the students to talk about the process of substitution and to make decisions.<br /> Before the students begin playing, I usually ask them to look at the expressions and put a mark next to the one they think will win. This can generate a good discussion after the game has finished.<br /> Extension: Give the students 2 different coloured dice. Tell them that one colour is positive, the other is negative.<br /> Extension: Give students a 10 sided, 0 to 9, die.</p>

<p>The activity is a substitution tournament. Students generate values to substitute into algebraic expressions. The expression which repeatedly has the highest value is the winner.<br /> I found the substitution tournament useful for encouraging students to practise substituting values into an algebraic expression.<br /> The game works well when it is played in pairs.<br /> The game aspect encourages the students to talk about the process of substitution and to make decisions.<br /> Before the students begin playing, I usually ask them to look at the expressions and put a mark next to the one they think will win. This can generate a good discussion after the game has finished.<br /> Extension: Give the students 2 different coloured dice. Tell them that one colour is positive, the other is negative.<br /> Extension: Give students a 10 sided, 0 to 9, die.</p>