Welcome to #octmchat! Thank you to @SteveWyborney for joining tonight’s conversation and sharing his amazing resources! Take a moment to introduce yourself.
I'm Steve. I'm a district math coach in Oregon. Excited to chat about estimation tonight!
By the way, it looks like there is about to be a gorgeous sunset in Oregon.
#octmchat
Hi, everyone! I'm Jodie Bailey. President of @ohioctm and math coach @HilliardSchools We've had 4 snow days so far - I know that is not nearly as many as some of you! #octmchat
It's Thursday! Glad to be here at #octmchat! I am Jacqui Lehmkuhl, Vice-President of Secondary for OCTM and high school teacher for Troy High School. We have had 7 snow days. #octmchat
Hi everyone! Brooke Lovely from @WilsonElem in Cincinnati, 2nd grade teacher and we have had two super duper cold days, and one two hour delay! #octmchat
Hi! So excited to begin this chat tonight! I’m Barb Weidus, math coach in the Cincinnati area. I’ve had 0 snow days! The 3 of us math coaches at HCESC worked on common assessments on those days. #octmchat
Thanks for joining #OCTMchat tonight! We've been spreading your resources around Ohio and appreciate your willingness to opening share your amazing work! :)
Glass 1 - How many buttons do you estimate are in the glass?
Why?
The answer - and another question - will appear in 2 minutes.
#octmchat@BaileyJodie@ohioctm
Glass 2 - How many buttons do you estimate are in the glass?
Why?
The answer - and another question - will appear in 2 minutes.
#octmchat@BaileyJodie@ohioctm
A1 is there a difference between estimate as a verb and an estimation? Many times we expect kids to round to find an estimate, so I find kids get confused about that when they are used to finding too low, too high and their estimates in other tasks. #octmchat
E1glass 1. I can see parts of 17 buttons, based on the surrounding objects the approximate size of the glass isn’t very big. I think I can see part of most of the buttons. My current estimates 21 buttons. #octmchat
34 Buttons- I could count around 12 in the front and I doubled for the back to 24. Then looked at the dice and know you like to give clues with the numbers so I picked 4 in the ones place. #octmchat
A1 is there a difference between estimate as a verb and an estimation? Many times we expect kids to round to find an estimate, so I find kids get confused about that when they are used to finding too low, too high and their estimates in other tasks. #octmchat
Glass 3 - How many buttons do you estimate are in the glass?
Why?
The answer - and another question - will appear in 2 minutes.
#octmchat@BaileyJodie@ohioctm
A2: I was off in my first estimate. I said 25 and the answer was 44. The second jar looks to have about half of the buttons - so I'm going with my estimate of 25 again for the second jar. #octmchat
It is less than the first glass. My first estimate was 24 and the actual was 44. I can see about 7 so my estimate for the second glass is 16. #octmchat
Glass 4 - How many buttons do you estimate are in the glass?
Why?
The answer - and another question - will appear in 2 minutes.
#octmchat@BaileyJodie@ohioctm
Glass 3 I say 55 buttons because it seems like one additional layer of buttons was added to Glass 1. It does not look like the quantity doubled. #octmchat
Glass 3 - How many buttons do you estimate are in the glass?
Why?
The answer - and another question - will appear in 2 minutes.
#octmchat@BaileyJodie@ohioctm
Here is the final answer! Let's dive into a discussion question in just a minute. As the question approaches, begin thinking about what you experienced in the repeated estimation process.
#octmchat@BaileyJodie@ohioctm
My first estimate 17 was incorrect so the next point of reference in Jar 2 corrected to 17 again. With jar 3, I'm considering 58 - just using the 21 as the point of reference, with the 44 and some more #octmchat
I have done esti-mysteries with a k class, we used the eraser tops. At first their guesses were so wild, they talked so much about why and how they estimated what they did. It was amazing and so much fun. #octmchat
Each time we estimated, I learned something from the previous example. I used the previous jars as reference points. i noticed a lot of other people had this strategy as well. (And I paid attention to their strategies to get ideas for myself!) #octmchat
I've seen many of those wild first guesses. They really do feel like guesses. It's interesting that the more we estimate in one context, the more precise our estimation becomes in other contexts. #octmchat
Thanks to @SteveWyborney's 20 days of NS, we have done a handful of these. I don't peek and do them along with the kids which is fun. (Beat the teacher!) My new favorite, is having students write their thinking, then share but NOT say any numbers. Value the process. #octmchat
A3: I apparentlyam a glass half full person, as I estimate big every time. I was in the vicinity each time and having the first number really helped. I liked the direction to think about how I came up with my answers. #OCTMchat
Q3 I am usually WAY off on my first estimation, but subsequent clues give me a solid base for the next estimations which end up being much better. #octmchat
A3- I’ve learned that when estimating I always think their are less! I have learned to use visual references to think about the reasonableness of my guess. I’m proud I was at least in the ballpark! #octmchat
I'm really glad you referenced the social context of estimation. It's a powerful part of estimation that we don't often consider when we discuss it. #octmchat
I have noticed that my students are much better at estimating the more we do them! My question-- think that students can 'lose' their ability to estimate if it doesn't continue on a daily basis? I don't know why I feel like this is a more fleeting skill. @SteveWyborney#octmchat
A3: I know I'm hesitant to make an estimate until I get a benchmark... I didn't join the conversation until I knew what was in Glass 1 (Why do I get so nervous to estimate?) #octmchat
Thanks to @SteveWyborney's 20 days of NS, we have done a handful of these. I don't peek and do them along with the kids which is fun. (Beat the teacher!) My new favorite, is having students write their thinking, then share but NOT say any numbers. Value the process. #octmchat
A3: The initial guess was the hardest, not only on the mathematical level, but it was a risk to put myself out there. The "units" were a mystery. Once I got a feel for the "Units , I was more comfortable with the other three, and do I dare say, did quite well. #Proud#octmchat
Q3: my estimates are more reasonable when I have a reference. Such as the answer to glass 1. However I’m sure the proportion of my estimates would have been similar to my original estimate. Ex: If I guessed 26 for glass 1, glass 2 would have been 13. Hope I make sense. #octmchat
I do think it is important to provide many opportunities, and also to help students identify the many estimations opportunities that are around us every day. #octmchat
I have noticed that my students are much better at estimating the more we do them! My question-- think that students can 'lose' their ability to estimate if it doesn't continue on a daily basis? I don't know why I feel like this is a more fleeting skill. @SteveWyborney#octmchat
A3: I tend to use iterations of a known quantity and picture that building up to the rest. It’s hard to know how much to include for the part that is not able to be seen. #octmchat
The "unknown" factor of estimation really is a powerful element for inviting conversation. It's such a great opportunity for all math learners. #octmchat
I think we are always supposed to be correct as teachers which puts pressure on ourselves rather than enjoying the freedom to practice growth mindset! #octmchat
A3: I learned I made better estimates with the more information I had. I kind of felt like I underestimated on my first estimate. I made adjustments in my numbers based on the glass being curved at the bottom so although it looked like 1/2 it would be a little less. #octmchat
Estimation Challenges are a great way to help students see the importance of revising. So many of us are saying our estimates changed & improved as we learned more information. Thank you for this experience @SteveWyborney#octmchat
Estimation Challenges are a great way to help students see the importance of revising. So many of us are saying our estimates changed & improved as we learned more information. Thank you for this experience @SteveWyborney#octmchat
The estimation activities also take away the pressure of "being right". They know they will get the chance to revise, so they just need to jump in and start somewhere. #octmchat
