Hi Carl,
 CB-->I am not sure if this fits with your age group or not.
 BA> Sometimes it seems like nothing ever fits with my age group until it's
 BA> adapted.
 CB> What age group are your students, (yup, I forgot).
 11 years , 6th graders, perhaps some 12 year olds as well.
 Peace
 Bob
... Catch the Blue Wave!
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