Tag Archives: division

163. Traffic light trail

In post 104 I mentioned a rather splendid traffic light percentages trail by Whidds (Percentages shout out”). This week I decided to create my own traffic light trail.

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How it works
Each card has three questions on it. Green is easy, amber is okay, red is challenging. Pupils write down the card number and which colour they are attempting. Pupils are free to choose the level of difficulty – however the teacher can direct them to harder/easier questions as appropriate.

My trail is about division:
Green = Division based on understanding of multiplication tables.
Amber = Short division, no remainders
Red = Same digits as amber, but with a decimal divided by an integer
Download theĀ Division traffic light trail.

Running the activity
My cards are actually powerpoint slides. I started by showing the class the first question and explaining how to choose and answer. I printed out the question slides 2 per sheet of A4 to make roughly A5 cards.

Of course, there was a twist – I hid the cards around my room and in the corridor. A helpful (tall) sixth former had even stuck one on the ceiling for me! There was a real feeling of enthusiasm as the class searched for and answered the cards. One pupil finished the whole trail very quickly, so he was sent around again. I suggested amber questions, he went for red cards and was very successful.

You might decide to award points for level of difficulty for an additional level of competition.

At the end of the activity, I showed the final slide of the presentation: colour coded answers. They marked their own work.

Review
I was really pleased by the increased level of engagement throughout the class. And burning off some surplus energy didn’t do any harm either!

88. Factor (Nasty) Game

Today, it’s a classic maths game which has been passed around for at least 12 years, if not longer. It develops basic number skills such as multiplication, division, factors, primes, squares and place value.

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Equipment
A whiteboard (or wall or floor)
Ten digit cards (0-9): you could also just write the digits, but cards are more fun/tactile.
Blu-tak
Mini-whiteboards (or paper)
Calculators are optional

Before you start
You need between 2 and 5 teams. Five gives you more tension/excitement.

Each team needs a whiteboard.
Indicate on the board where each team puts their cards. They need tens and units columns.

Blu tak the number cards to the board.

Basic game
Each team takes it in turn to pick a card and place it in one of their columns. This is repeated so that every team has a two digit number. If you have five teams, there will be no leftover digits.

Winners
The winning team is the one whose number had the most factors. It is up to the teams to prove this by giving all the calculations of factors. Other teams may challenge their accuracy. You can also discuss why some numbers have an odd number of factors (eg square numbers) or exactly two factors (prime numbers).

Time to get Nasty
I said this game was called Factor Nasty … and it is.

There is only one change to the game rules: you can pick a digit and put it in any team’s answer box. They can use their number skills to really stitch each other up.

Imagine Team A puts a 0 in Team C’s tens column. Then Team B puts a 3 in Team C’s units column. Team C can’t do anything to improve their number, but they can make life tricky for Team A and B. Meanwhile, Teams D and E ignore them and create really good answers.

Have fun trying this as a starter or plenary!