Mental Mondays #13
In our previous mental and oral suggestion (Mental Monday #12) we focussed on calculation. That activity involved displaying a grid of numbers and challenging the children to choose numbers to solve specific problems.
While this starter idea looks similar on the surface, it has a different focus. Here we display a grid of numbers and ask children to identify particular numbers according to a set of properties. It is what some call a "Target Board" activity.
Here's how it works. You show a grid of 20 numbers:
Then ask children to write on mini-whiteboards a number they can see on the grid that is, for example:
- An odd number...
- A multiple of 5...
- A square number...
- A triangular number...
- A number 4 away from a prime number...
Clearly, the first statement has many potential options, you make it clear that any one will do. The next three statements are slightly more tricky, and the final one is more advanced still and should provoke some thought and conversation.
As with most of our Mental and Oral starter ideas, there are two main thrusts behind the activity:
- The real power that drives the learning is in the conversations that the children have about what they are doing - sharing knowledge and strategies
- The idea is totally flexible, and can me made more or less challenging with ease.
Many other potential statements can be created:
A number where... the Tens digit is twice that of the Units digit
A number which... has 4 factors
A number where... the digits sum to 12
A number which... is a factor of 63 and 140
A number where... both digits are prime numbers
Just for completeness, we've added a pdf attachment with three different Target Grids and a set of suggested questions.
If you like this mental & Oral starter idea please send us some Google+ love, and let your friends and colleagues know about mathsticks.com