Counting by 1’s and 10’s Unit of Study: Counting and Modeling Numbers to 120 Global Concept Guide: 1 or 4

Content Development  “Children may be able to count forward by ones, starting at 1, but may have difficulty counting on from any given number.”  “Recognizing and mastering number patterns helps children count on from any given number.” GO Math Chapter 2 TE p 241A  Counting by 1’s and 10’s lays a foundation for place value and operations.

Day 1  Day 1 builds upon skills from Kindergarten of counting on by 1.  Students should have multiple opportunities to practice counting on starting at any number from  The use of a 100/120 chart will allow students to see patterns and understand how the numbers in the sequence are related.  Refer to numbers as “one more / one less” based on its position. 78 is one less than 79 because it comes right before 79

Day 1  To show how the 100 chart and number lines are related, the 100 chart can be cut and taped into a number line.

Day 2  The objective for Day 2 is to work with counting by tens starting at any number.  Engage students at the beginning of the lesson by reviewing decade numbers(10, 20, …).  To incorporate hands-on learning, have students color or mark columns on a 120 chart to show patterns of counting by ten. Start with one column and have students make comparisons as you add more columns.  Refer to numbers as “ten more/ten less” based on its position.

Day 3  Use Day 3 to differentiate based on needs of your students.  The use of the 120 numbers cards and pentomino game listed in the GCG can be adapted for multiple levels of learners.  By the end of Day 3, students will need to be able to count by 1’s or 10’s from any number to 120 and becoming less dependent upon the use of the 120 chart.

Pentomino Activity  Write a number with a wet erase marker on one square of each pentomino.  Have students record the missing numbers based on the location of the known number  Students can use a 120 chart to check their work.

Enrich/Reteach/Intervention  Enrich  Partially filled backwards 120 chartbackwards 120 chart  Number riddles as is Lesson 6.2 p 247 #10 and 11  Intervention/Small Group  GO Math Lesson 6.2 – Tier 2 RtI Intervention TE 245B  GO Math Strategic Interventions – Skill 15  GO Math Strategic Interventions – Skill 20  Nearby Teen Game Nearby Teen Game