Using a key Classifying Mr Men

How do we create a key to identify the Mr Men? Work through the next few slides trying to decide a question that will divide and ultimately name the Mr Men. The first question needs to split the group of 8 into 2 groups of 4 as they are standing in this line.

Start with a template NO

Start Question to split into 2 groups NO YES

Start Eg. Does he have a hat? NO YES

Start 2 nd question to split again NOYES Does he have a hat? NO YES

Start Does he have a hat? Eg.Does he have hair? NO YES NO YES

Start Question Last question to identify them NOYES NOYES Does he have a hat? NO YES

Start Does he have a hat? Does he have hair? Eg.Is his hair straight ? NO YES NO YES NOYES Mr Clumsy Mr Fussy

Now continue to work out questions until you have managed to identify all 8 Mr Men. There is a Word document for you to work on

Harry GeorgeTedBenOllieJonArnieStan _____ What are the Mr Mens first names? Does he have a hat? Is his body square?Does he have hair? Is he wearing shoes? Is his hair straight ?Is he waving?Is he smiling? NO YES NO YES NOYES NO YES NO YES NO

Have you worked their first names out ? Move onto the next slide to check.

The Mr Mens first names are ………. Does he have a hat? Is his body square?Does he have hair? Is he wearing shoes? Is his hair straight ?Is he waving?Is he smiling? NO YES NO YES NOYES NO YES NO YES NO Harry GeorgeTedBenOllieJonArnieStan _____ Harry George Ted Ben Ollie Jon Arnie Stan

Different types of key Some keys look different but work the same way, using questions to split the things into smaller groups.

First Question – Try to think of a question which splits the items in half. Yes answer No answer Second Question – Should split this group of items again Third Question - Should be used to identify one of the items Yes answer No answer Yes answer No answer Name of Item Fourth Question - Should be used to identify one of the items Fifth Question - Should be used to identify one of the items Yes a No answer Name of Item No answer Name of Item Yes answer

NO YES Has he got hair? Yes No Has he got bare feet? No Yes Another style of Key

NO YES Yes No Has he got bare feet? NoYes

Now for a challenge! Can you design your own key?

Remember Question to split into 2 groups NO YES 2 nd question to split again Last question to identify them