Block Builders SlidesLESSON 1 • GRADE 2 MATH Place Value Construction Crew Block Builders: Trading Ones for Tens Discover what happens when our ones column gets too crowded! 1 Build both numbers 2 Count the ones 3 Trade 10 ones for 1 ten The Golden Construction Rule Never More Than 9 in the Ones Room! 10 Loose Unit Cubes 1 1 1 1 1 1 1 1 1 1 When you gather 10 ones... SNAP! 1 Ten Rod They trade into exactly 1 ten rod! ⚡ Big Math Truth: 10 Ones = 1 Ten! Always trade when you have 10 or more. Guided Problem Let's Solve: 27 + 15 Step 1: Put Ones Together Tens (Rods) Worth 10 27 has 2 tens: 15 has 1 ten: Ones (Cubes) Worth 1 7 ones + 5 ones = 12 ones! 🚨 12 is greater than 9! We must trade 10 ones for 1 ten! We bundle 10 ones and send them next door as 1 brand new ten rod! The Finished Build 27 + 15 = 42 Step 2: Total the Columns Tens Column 2 tens + 1 ten + 1 NEW traded ten = 4 tens Original Ten Original Ten Original Ten ⭐ NEW Traded Ten! 4 Tens = 40 Ones Column 12 ones − 10 traded = 2 ones remaining 1 1 2 Ones = 2 4 Tens (40) + 2 Ones (2) = 42 Crew Challenge Partner Turn & Talk: Solve 38 + 26 1 Build It Partner A builds 38. Partner B builds 26. Place all blocks on your mat. Tens & Ones Mat 2 Count & Trade Count the ones: 8 + 6 = 14. Can we trade? YES! Trade 10 cubes for 1 ten rod. 10 cubes ➔ 1 rod 3 Find Total How many tens now? How many ones are left? State your sum clearly to the crew! Final Sum: 64 🗣️ Sentence Starter: "I know we need to regroup because 14 ones is more than 9 ones!"
Block Builders Activity SheetRegroup Squad • Lesson 1 Block Builders Activity Sheet Name: Date: Builder's Golden Rule: Count the ones first! If you have 10 or more ones, trade 10 unit cubes for 1 ten rod. Place-Value Building Mat Use your blocks or sketch here! TENS (Rods) Value = 10 ONES (Cubes) Value = 1 Trade 10 1 Guided Build: Solve 36 + 18 Guided Walkthrough Step A: Add Ones 6 ones + 8 ones = Total ones counted Step B: Trade 10 Ones Ones left after trade: New 1 ten moves over! Step C: Add Tens 3 tens + 1 ten + 1 new ten = Total tens Final Sum: 36 + 18 = Block Builders Math Lab • Page 1 of 2 Independent Build Trade & Total Practice Show work using block sketches! 2 47 + 25 Tens Work Ones Work Did you trade 10 ones? [ ] Yes [ ] No Sum: 3 53 + 39 Tens Work Ones Work Did you trade 10 ones? [ ] Yes [ ] No Sum: 4 Builder Challenge Story Leo snapped together 28 blue bricks for a tower. Maya added 16 red bricks to the top. How many bricks did they use in all? Draw Tens Rods and Ones Cubes: Equation: Total Bricks: Builder's Reflection Complete the rule with your own words: When I add the ones and get 10 or more, I trade 10 ones for . This is called regrouping because . Block Builders Math Lab • Page 2 of 2
Sketch Squad SlidesLESSON 2 • GRADE 2 MATH Pencil Power Representations Sketch Squad: Quick Tens & Circle Bundles No blocks around? No problem! Use quick sketches to regroup anywhere. | Draw Sticks for Tens • Draw Dots in 5-Groups ↺ Lasso 10 to Bundle Sketch Secret Code Quick Drawings Save Math Time! Quick Ten = 1 Tall Line Instead of drawing 10 tiny squares, draw one clean vertical stick! Quick Ones = 5-Group Dots Arrange dots in rows of 5 like ten-frames. It makes spotting 10 effortless! 💡 Pro Tip: Keeping your dots organized makes bundling 10 easy and error-free! Step-by-Step Sketch Draw: 36 + 27 Step 1: Sketch Both Numbers 36 3 Tens + 6 Ones 3 sticks and 6 dots 27 2 Tens + 7 Ones 2 sticks and 7 dots Look at all the dots: 6 + 7 = 13 dots. Can we bundle 10? Yes! The Circle Trick Lasso 10 and Make 1 Ten! Step 2: Circle & Regroup Lasso 10 Ones Dots Draw a big loop around 10 dots: Draw an arrow over to the tens! Count the New Total | Tens: 3 + 2 + 1 new stick = 6 tens (60) • Ones: 3 loose dots left = 3 ones (3) (Uncircled leftovers) 36 + 27 = 63 The circled bundle turns into +1 quick stick in the tens place! Whole-Group Practice Quick-Draw Showdown: Solve 45 + 28 1. Sketch Draw 4 sticks and 5 dots for 45. Draw 2 sticks and 8 dots for 28. Keep dots in 5-groups! 2. Lasso Count 5 dots + 8 dots = 13 dots. Lasso a circle around 10 dots! Add 1 new stick. 10 dots ➔ 1 stick 3. Announce Count all sticks: 4 + 2 + 1 = 7 tens. Loose dots = 3 ones. Sum: 73 Ready pencils! Hold up your quick-draw boards in 3... 2... 1!
Sketch Squad Practice SheetRegroup Squad • Lesson 2 Sketch Squad Practice Sheet Name: Date: Artist Code: Quick Ten = | (Stick) • Quick One = • (Dot) • Bundle = Circle 10 & Draw Arrow Draw in 5-groups! 1 Guided Sketch: 29 + 14 Follow Steps A. Sketch 29 (2 sticks, 9 dots): B. Sketch 14 (1 stick, 4 dots): C. Lasso 10 dots & draw an arrow to make 1 new stick: 9 dots + 4 dots = 13 dots. Circle 10 dots! Loose dots left: 3 29 + 14 = 2 Sketch & Lasso: 38 + 25 Draw sticks and dots in the box below Tens Sticks (|) Ones 5-Group Dots (•) Did you bundle 10 dots? [ ] Yes [ ] No Total Sum: Sketch Squad Math Lab • Page 1 of 2 Independent Sketching Pencil Power Regrouping Circle every group of 10! 3 56 + 17 Draw sticks and 5-group dots: Bundled 10? [ ] Yes Sum: 4 44 + 38 Draw sticks and 5-group dots: Bundled 10? [ ] Yes Sum: 5 Art Room Marker Count The art table has 37 green markers in a bin. Mr. Diaz brings over 26 purple markers. How many markers are there in all? Sketch Quick Sticks and Dots: Number Sentence: Total Markers: Artist Self-Check Dots in 5-groups Circled 10 neatly Drew new ten stick Sketch Squad Math Lab • Page 2 of 2
Model Masters SlidesLESSON 3 • GRADE 2 MATH Master Strategists Model Masters: Blocks, Sketches & Numbers Discover the secret behind the little "1" on top of the tens column! Blocks: Trade 10 Sketches: Circle 10 Numbers: Regroup 1 The Big Connection They All Say the Exact Same Thing! Model 1: Blocks Physical Trade 10 small unit cubes snap into 1 blue ten rod. × 10 = 10 Ones ➔ 1 Rod Model 2: Sketch Circle Bundle Lasso 10 dots with a ring and draw 1 stick into tens. 10 dots ➔ 10 Dots ➔ 1 Stick Model 3: Equation The Rooftop "1" Write the new ten as a small "1" above the tens column! 1 New Ten! 10 Ones ➔ Regroup 1 Ten ⚡ Key Insight: The little "1" on top of the equation IS the new ten rod! Dual Model Showdown Solve 48 + 35 Step 1: Focus on Ones Sketch & Lasso Method 8 ones + 5 ones = 13 ones Lasso 10 dots ➔ +1 stick 3 dots left over The bundle travels over to join the 4 sticks and 3 sticks. Vertical Equation Method 1 4 8 + 3 5 3 8 + 5 = 13: Write 3 in ones, carry 1 to tens rooftop! Look at both: The circled bundle and the little rooftop "1" do the exact same job! Dual Model Showdown Totaling the Tens: 48 + 35 = 83 Step 2: Add All Tens Count the Sticks 4 sticks (from 48) + 3 sticks (from 35) + 1 new stick (from bundle) 8 Tens = 80 Add the Tens Column 1 4 8 + 3 5 8 3 1 + 4 + 3 = 8 Tens 8 Tens (80) + 3 Ones (3) = 83 Total! Mathematician's Toolkit Which Model Would You Choose? Base-Ten Blocks Best when you want to touch and physically trade. Great for discovering new concepts! Hands-on Builder Quick Sketches Best when you have pencil and paper. Fast, clear, and lets you see the lasso bundle! Anywhere Strategy
Model Masters Showdown WorksheetRegroup Squad • Lesson 3 Model Masters Showdown Worksheet Name: Date: The Master Connection: When you lasso 10 ones in your sketch, you write 1 above the tens column in your vertical problem! Dual Strategy 1 Guided Match: Solve 37 + 45 Both Ways Side-by-Side Model A: Quick Sketch Draw sticks and 5-group dots. Lasso 10 dots! Circled bundle = +1 stick Model B: Vertical Addition Write the regrouped ten in the rooftop box: 3 7 + 4 5 7 + 5 = 12 (Write 2, carry 1) Both models give the exact same sum: 82! 2 Connect the Strategies: 58 + 26 Show both methods Quick Sketch & Bundle: Vertical Problem: 5 8 + 2 6 Final Verified Sum: Model Masters Math Lab • Page 1 of 2 Mastery Assessment Strategy Showcase & Exit Ticket Explain your thinking! 3 Strategy Match-Up Draw a matching line from each representation to the correct sum: A. 4 rods + 15 unit cubes (after 1 trade) ➔ 55 B. 6 sticks and 14 dots (after lassoing 10) ➔ 74 C. Vertical problem: 49 + 33 with regrouped ten ➔ 82 4 Master's Choice Challenge: 64 + 29 Pick any model! Show your favorite way to solve (blocks sketch, lasso dots, or vertical grid): My Work Space: Which model did you pick? [ ] Blocks [ ] Quick Sketch [ ] Vertical Equation Total: Regroup Squad Exit Ticket Check for Understanding 1. When you add \(7 + 8 = 15\), why do you only write 5 in the ones column? 2. Quick Check: What is 46 + 37? Answer: Model Masters Math Lab • Page 2 of 2
