Help in teaching estimation & reasonableness to 3rd & 4th graders

[Mary E Bryan <mebryan@TENET.EDU>]

Our 3rd and 4th grade teachers are scrambling around looking for help in
getting the concept of estimation & reasonableness across to their
students.  I suggested the title Moira's birthday by Munsch to help with
reasonableness.  Anyone out there have any more help.  Titles or examples
or suggestions from your teachers.  Any sources would be
appreciated.  These problems show up on our state's testing instrument.
TIA  email me directly please.  mebryan@tenet.edu