Estimation

​** Estimation - (to make) an approximate or rough calculation often based on rounding from [] **   Rounding off** [|1.] very clear information for teaching students the rules for rounding off - printable sheets [|2.] rhymes & raps to help students remember [|1.] some interesting open-ended activities for presentation to students - there are also many links to other good sites on mathsforum [|2.] many interesting activities for presentation to students - is a good site for many other areas of maths
 * Interactive sites for teachers to use with their students
 * Estimation**