Thursday, April 4, 2013

Numbers in Base 10

I am reading a book called Common Core Mathematics in a PLC at Work Grades K-2.  It is written by Matthew R. Larson and a whole group of other authors.  Here's the Amazon link.  It's a great book that leads you through what a math PLC would look like and how to read the standards and use them effectively.  I am not very far into it, but I was sharing some of it at our last PLC.  One of the things it mentioned was the idea of creating anchor lessons for the standards.  These are lessons that everyone teaches during the course of teaching a standards. I don't know about your school, but at my school we follow the district curriculum map for what should be taught in each quarter, but then every classroom is different.  If you went into my classroom and then someone else's on the team, you might not see the exact same standards being taught that week, and you certainly would not see the same lessons!  I don't love this- I think there should be more sharing of great lessons and activities, but we haven't gotten there yet as a team.  So, long story short- we decided to create a series of assessments for the NBT1 standard and then create an anchor lesson for that standard that we all can teach to introduce the standard.  Eventually, the assessments will be part of a product on TpT to go along with my other math assessments, but I wanted to share some of our work with you.  The three things all go together.  We decided to help students understand base 10 better we needed to connect those tools with other math tools we've used before- specifically ten frames, tally marks and linking cubes.  So, we came up with this lesson. NBT1 Anchor Lesson It uses a "bridge map" as the foundation, so if you are not familiar with that the lesson might not make sense.  But the basic premise is that students are matching the base 10 representation of teen numbers to the ten-frame, tally mark, linking cube and word representations. The Bridge Map Freebie has the cards needed for the activity as well as a little explanation.  The NBT1 Practice Worksheet is just that- practice of what they need matching the base 10 model with something else.  Here are some pictures of the students working on their bridge maps.  At the end, there is a picture of one page of the worksheet.

Students cut and paste these and place them on the worksheet above.


  1. oh wow, that looks great! we are moving in our district towards more standardization as far as teachers using common language in Language Arts and Math this year. I like it because it makes the kids all on the same level playing field in one aspect. Also if a teacher isn't sure about teaching a concept, it would alleviate some of the confusion with mentor lessons.

    Our new superintendent would really be happy to hear this. It all sounds good, but sometimes administrators forget that teaching is an ART and we all NEED to put our own spin or our own heart into what we teach. I think whoever comes up with the lessons has a great advantage of being the one who totally understands the concepts and lessons.

    In our district - they are even moving to have us all teach the same subjects at the same time :(

  2. I love this! Thanks for the good ideas ~ I have to come up with a good way to work on number of the day with my first graders. I really like how visual you've made it. Some of my little ones will need this approach.
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