Estimation is a math /life skill that some teachers cover as a unit in math at some point in the year. As with many others I believe that because it IS a life skill, estimation should be worked on consistently throughout the year and should be interconnected in all curriculum areas.
Included here is a set of 16 original estimation activities (in random order) that I have designed to be done quickly as a whole class, small group or even individually at some point during the school day.
I have used all of these in my classrooms and they have consistently been a hit as they are not so much like work as fun challenges. Included for some are optional activity cards.
A space is left on the activity cards so that you can designate whether or not the students add their names to their estimates..
For some of the activities you will need a projection device, for some a ballot box ( I used tissue boxes as the slot was already in the top!) and for others no materials are required at all.
Except for those I suggest may carry on throughout the day these activities take only a few minutes from set up to completion.
These estimation activities often spark further research or discussion on the topic and have consistently been a hit with students in my grades 4-6 classes. They are particularly effective in multi age classrooms
( 4-6) I have used many of these activities in lower grade multi age classes as well as my experience shows that in every class regardless of grade, you have students in a VERY wide range of abilities and interests.