Here’s our favorite video to explain how blogging works. Watch and see how you can interact with other educators using Singapore math or Math in Focus. The walls of your school are coming down. You no longer need to be invited to a regional conference to become a better teachers. Join in the conversation with educators from around the world…online!
See other Common Craft shorts by Lee Lefever to hear “in plain english” how to participate in many online and offline interactions. You might impress some of those tech-savvy students that think teachers prefer typewriters and rotary phones!
3 comments
rona zukerberg says:
September 23, 2011 at 6:15 am (UTC -7)
I am looking for ways to count back on the numberline from 2,309 back to 2,299. What is the best way to explain this to a struggling math group?
kellitrainer says:
September 26, 2011 at 5:06 pm (UTC -7)
Rona, this is a great question. While I find the best use of technology to demonstrate this, consider first demonstrating the same concept, but with smaller numbers. Begin by challenging students to count up (mentally) by 2′s, 10′s and 100′s. Next, as students to build the number 309 on a place value mat using Base 10 blocks. Then, practice counting on by 10 and back by 10, removing/adding a a tens rod with each corresponding count.
When counting back from 309, stop and ask, “What is ten less than 309?” Ask students if they are sure and to demonstrate their thinking using their concrete materials, which will require regrouping in the ones, tens and hundreds place. From here, demonstrate the process using a number line (with tickers on each 10) to translate the pictorial representation using the concrete experience. Next, ask students if you can do the same thing with larger numbers. They should generalize that this method works with any number because our number system relies on the patterns of Base 10.
Another strategy would be to use mental math. Take 2, 309 and subtract 9 (2,300) and then subtract one more (2,299). Consider that you counted back a total of 10. Check by counting on by 10.
Shelley S. says:
August 12, 2012 at 2:06 pm (UTC -7)
My school is switching to Singapore this year. I teach fifth grade and am very scared! Any tips for me since I will be jumping in with kids without any Singapore behind them? Also, should I separate the place value chips in groups of ten and make sets of chips (ex: 10 of each value in one bag)?