tag:blogger.com,1999:blog-2256375873271579383.post6511419751798811395..comments2024-03-27T23:55:01.532-07:00Comments on Divisible by 3 [Andrew Stadel]: Estimation vs. guessing Part 1Anonymoushttp://www.blogger.com/profile/06699410662148629132noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-2256375873271579383.post-30827841511703677542012-09-29T03:36:25.340-07:002012-09-29T03:36:25.340-07:00Great post! I am just starting to follow several m...Great post! I am just starting to follow several math blogs - and I teach grade 7 and 8 as well.<br /><br />The language you mentionn from the grade 4 class, actually links to our grade 7 and 8 probability expectations - using language to describe different degrees of probability. (Ontario, Canada)<br /><br />I like to tie estimation to calculator use - tell the kids "calculators are dumb - they only answer what you ask" and warn about mis-keyed questions (especially losing a decimal, or having a sticky key repeat) It is so important that they keep estimating as they use algorithms for arithmatic with fractions and decimals - I hope to teach them that if their estimates are far from their answers, they are probably mis-using the algorithm.<br /><br />(The best example for me - multiplication and division with zero and one. Kids oftten guess wrong, and I bring them back to mental math with questions like "there are 5 people, and I want to give each of them ZERO cookies - how many do I need" .... they all know the answer! (then extend to 100 people, 793 256 - or other large random number to confirm that they DO know this fact, and extend it to 7/5 of a person, or 8.05 or whatever)<br /><br />Sarahfoodmathquiltshttps://www.blogger.com/profile/06681120171564102892noreply@blogger.comtag:blogger.com,1999:blog-2256375873271579383.post-57613962855512157382012-09-28T19:37:51.744-07:002012-09-28T19:37:51.744-07:00Yea, the teacher did a fantastic job with her stud...Yea, the teacher did a fantastic job with her students!Anonymoushttps://www.blogger.com/profile/06699410662148629132noreply@blogger.comtag:blogger.com,1999:blog-2256375873271579383.post-47440507555238019362012-09-27T03:35:26.941-07:002012-09-27T03:35:26.941-07:00This is a great way to get kids to start estimatin...This is a great way to get kids to start estimating and it gets at the heart of it by allowing them to count some of the blocks, and then use that "chunk" as a reference to figure out the rest.Mr Krafthttps://www.blogger.com/profile/10308503886516396943noreply@blogger.com