Mariela Santillana is a curriculum designer and the founder of Math Tech Connections. She is a former classroom teacher who is passionate about creating engaging, standards-aligned resources for grades 1–6.
Are you looking for a fun way to encourage math talk with your 5th graders? Which One Doesn't Belong prompts are a fun way to get students writing & talking about math! Use as math warm ups, whole group spiral review, or add to your math centers! Each topic includes 5 prompts, so your students will have plenty of practice.⭐Click the PREVIEW button to download 30 FREE Prompts!WHAT'S INCLUDED:Set #1: Numbers in Base Ten (35 prompts) Place ValueNumber FormsRoundingAdditionSubtractionMultiplicat
Develop a deep understanding of decimal place value and operations, including reading, writing, comparing, adding, subtracting, multiplying, and dividing decimals, with this complete 5th grade guided math unit. This comprehensive unit includes 3 mini-units and 14 complete lessons designed for whole group instruction, small group practice, independent work, and assessment. This Unit Includes:Mini-Unit 1: Understanding Decimals & Place Value• Lesson 1: Reading & Writing Decimals • Lesson 2: Pla
Develop a deep understanding of fraction operations and concepts, including adding, subtracting, multiplying, and dividing fractions, with this complete 5th grade guided math unit. This comprehensive unit includes 3 mini-units and 10 complete lessons designed for whole group instruction, small group practice, independent work, and assessment. This Unit Includes:Mini-Unit 1: Adding & Subtracting Fractions• Lesson 1: Adding Fractions • Lesson 2: Adding & Subtracting Fractions • Lesson 3: Proble
Develop a deep understanding of decimal place value, powers of 10, and comparing, ordering, and rounding decimals with this complete 5th grade guided math mini-unit. This mini-unit is part of a comprehensive 5th Grade Place Value & Operations Unit and includes 7 complete lessons designed for whole group instruction, small group practice, independent work, and assessment. Mini-Unit 1 Includes:• Lesson 1: Reading & Writing Decimals • Lesson 2: Place Value Relationships • Lesson 3: Powers of
Develop a deep understanding of decimal operations, including addition, subtraction, multiplication, and division, with this complete 5th grade guided math mini-unit. This mini-unit is part of a comprehensive 5th Grade Place Value & Operations Unit and includes 4 complete lessons designed for whole group instruction, small group practice, independent work, and assessment. Mini-Unit 3 Includes:Lesson 1: Adding DecimalsLesson 2: Subtracting DecimalsLesson 3: Multiply DecimalsLesson 4: Multiply
Develop a deep understanding of fractions as division and dividing fractions with this complete 5th grade guided math mini-unit. Students explore fraction division concepts, unit fractions, real-world word problems, and problem solving using models, equations, and reasoning. This mini-unit is part of a comprehensive 5th Grade Fractions Unit and includes 3 complete lessons designed for whole group instruction, small group practice, independent work, and assessment. Mini-Unit 3 Includes:• Les
Develop a deep understanding of multi-digit multiplication and division, including estimation, strategies, and the standard algorithm, with this complete 5th grade guided math mini-unit. This mini-unit is part of a comprehensive 5th Grade Place Value & Operations Unit and includes 3 complete lessons designed for whole group instruction, small group practice, independent work, and assessment. Mini-Unit 2 Includes:• Lesson 1: Estimating Products • Lesson 2: Multiplying Multi-Digit Whole Numb
Develop a deep understanding of multiplying fractions, including fraction by whole number, fraction by fraction, mixed numbers, estimation, and problem solving, with this complete 5th grade guided math mini-unit. This mini-unit is part of a comprehensive 5th Grade Fractions Unit and includes 4 complete lessons designed for whole group instruction, small group practice, independent work, and assessment. Mini-Unit 2 Includes:• Lesson 1: Understanding Multiplication as Scaling • Lesson 2: Mul
Develop a deep understanding of adding and subtracting fractions with unlike denominators, including equivalent fractions, mixed numbers, estimation, and problem solving, with this complete 5th grade guided math mini-unit. This mini-unit is part of a comprehensive 5th Grade Fractions Unit and includes 3 complete lessons designed for whole group instruction, small group practice, independent work, and assessment. Mini-Unit 1 Includes:• Lesson 1: Adding Fractions • Lesson 2: Subtracting Frac
Review and practice fractions as division with this engaging 5th grade guided math lesson. Students learn how fractions represent division and apply this understanding to real-world sharing situations using models, equations, and reasoning. Students build strong conceptual understanding by modeling equal sharing, writing division equations with fraction quotients, and connecting division to multiplication. Designed for small group instruction, this lesson helps students interpret fractions a
Review and practice dividing unit fractions by whole numbers with this engaging 5th grade guided math lesson. Students learn to interpret fraction division and apply their understanding to real-world word problems using models, equations, and reasoning. Students build strong problem solving and fraction division skills by modeling division in multiple ways, connecting division to multiplication, and analyzing how the size of the unit changes. This lesson supports both conceptual understandin
Review and practice dividing whole numbers by unit fractions with this engaging 5th grade guided math lesson. Students explore division using models, equations, and real-world word problems to build deep understanding. Students develop strong conceptual understanding by modeling how many fractional units are in a whole and connecting division to multiplying by the reciprocal. Designed for small group instruction, this lesson helps students solve problems, model their thinking, and explain t
Review and practice multiplying fractions with this engaging 5th grade guided math lesson. Students explore how multiplying fractions impacts the size of a product using visual models and equations. Students build understanding by modeling fraction multiplication, analyzing how products change, and using different strategies including improper fractions, mixed numbers, and decimals. Designed for small group instruction, this lesson helps students model fraction multiplication, compare produ
Review and practice multiplying fractions by whole numbers with this engaging 5th grade math lesson. Students explore how multiplication affects the size of a number using visual models and equations. Students build conceptual understanding by analyzing how products change when multiplying by fractions greater than 1 and less than 1. Designed for small group instruction, this lesson helps students model fraction multiplication, reason about magnitude, and explain their thinking. What's Inclu
Review and practice multiplying fractions as scaling with this engaging 5th grade math lesson. Students explore how multiplication affects the size of a number using visual models, number lines, and real-world contexts. Students build conceptual understanding by analyzing how products change when multiplying by fractions greater than 1 and less than 1. Designed for small group instruction, this lesson helps students model fraction multiplication, reason about magnitude, and explain their thi
Review and practice problem solving with addition and subtraction of fractions with this engaging 5th grade math lesson. Students solve one-step and multi-step word problems using mixed numbers, improper fractions, and real-world contexts. Students use estimation, equations, models, and common denominators to solve problems, determine appropriate operations, and check their work for accuracy. Designed for small group instruction, this lesson helps students analyze word problems, choose oper
Review and practice dividing decimals with this engaging 5th grade math lesson. Students use place value reasoning, estimation, and multiple strategies to divide decimals and explain their thinking. They also use multiplication to check their work, building a deeper understanding of decimal operations. Designed for small group instruction, this lesson helps students understand how decimals impact quotients, use models to represent division, and apply efficient strategies to solve problems. W
Review and practice multiplying decimals with this engaging 5th grade math lesson. Students use place value reasoning, scaling, estimation, and multiple strategies to find products and analyze their accuracy. Designed for small group instruction, this lesson helps students understand how decimals affect the size of a product, choose efficient strategies, and explain their thinking. What's Included• 21 PowerPoint lesson slides for whole-class instruction • 1 Math mat for small-group guided
Review and practice dividing multi-digit whole numbers with this engaging 5th grade math lesson. Students use estimation strategies, area models, partial quotients, and the standard algorithm to solve problems and check for reasonableness. Designed for small group instruction, this lesson helps students make reasonable estimates, determine when remainders occur, analyze the accuracy of their answers, and explain their thinking. What's Included• 27 PowerPoint lesson slides for whole-cla
Review and practice estimating products and quotients with this engaging 5th grade math lesson. Students estimate multi-digit multiplication and division problems using rounding, compatible numbers, and magnitude reasoning. Designed for small group instruction, this lesson helps students choose effective strategies, determine if estimates are reasonable, and explain their thinking. What's Included• 22 PowerPoint lesson slides for whole-class instruction • 2 Math mats for small-group guide
Mariela Santillana is a curriculum designer and the founder of Math Tech Connections. She is a former classroom teacher who is passionate about creating engaging, standards-aligned resources for grades 1–6.
My own education history
Bachelor's in Elementary Education from the University of Central Florida
Additional biographical information
I was born in Mexico but have lived in the USA since I was two years old. According to my mom, I have always wanted to be teacher. I currently live in Florida with my husband, 3 kids, 3 dogs, and 1 rabbit.
We have a very blessed life :)
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