## Weekly Overview

Weekly Topics

The focus of this week’s instruction is to deepen students’ understanding of:

• Add and subtract like units
• Make a ten to add 100
• Take from 10 within 20
• Bundle and count ones, tens, and hundreds to 1,000
• Count up and down between 90 and 1,000 using ones, tens, and hundreds

Materials Needed

• Student Print Packets for each day
• End of Week Assessment
• Dry erase board with markers
• 24” ribbon or paper strip
• Base Ten Blocks
• Teacher Rekenrek

Standards Covered

2.OA.A.1 Add and subtract within 100 to solve one- and two-step contextual problems, with unknowns in all positions, involving situations of add to, take from, put together/take apart, and compare. Use objects, drawings, and equations with a symbol for the unknown number to represent the problem.

2.OA.B.2 Fluently add and subtract within 30 using mental strategies. By the end of 2nd grade, know from memory all sums of two one-digit numbers and related subtraction facts.

2.NBT.A.1 Know that the three digits of a three-digit number represent amounts of hundreds, tens, and ones (e.g., 706 can be represented in multiple ways as 7 hundreds, 0 tens, and 6 ones; 706 ones; or 70 tens and 6 ones).

2.NBT.A.2 Count within 1000. Skip-count within 1000 by 5s, 10s, and 100s, starting from any number in its skip counting sequence.

2.NBT.B.5 Fluently add and subtract within 100 using properties of operations, strategies based on place value, and/or the relationship between addition and subtraction.

Representations

• 100-bead Rekenrek
• 5-group column
• Dice
• Number bond
• Personal whiteboards
• Place value chart
• Decomposing Numbers
• Quick ten (vertical line representing a unit of ten)

Additional Terms and Symbols

• Bundling, grouping (putting smaller units together to make a larger one, e.g., putting 10 ones together to make a ten or 10 tens together to make a hundred)
• Ones place (e.g., the 6 in 576 is in the ones place)
• Tens place (e.g., the 7 in 576 is in the tens place)
• Units of ones, tens, hundreds, one thousand (a single one and groups of 10s, 100s, and 1,000)
• Make a ten (compose a unit of ten, e.g., 49 + 3 = 40 + 10 + 2)
• Base ten numerals (e.g., a thousand is 10 hundreds, a hundred is 10 tens, starting in Grade 3 a one is 10 tenths, etc.)
• Hundreds place (e.g., the 5 in 576 is in the hundreds place)
• One thousand (1,000)
• Standard form (e.g., 576)
• Unit form (e.g., 5 hundreds 7 tens 6 ones)
• Word form (e.g., five hundred seventy-six)

## Materials List

The following materials list will be used for the entire four weeks: Materials List.

## Alternative Video Links

The links in this document are for users who cannot access the links in the lesson plans.