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.
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 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
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 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
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 multiplying multi-digit whole numbers with this engaging 5th grade math lesson. Students use estimation strategies and the standard algorithm to solve problems and check for reasonableness. Designed for small group instruction, this lesson helps students make low and high estimates, analyze the accuracy of their answers, and explain their thinking. What's Included• 19 PowerPoint lesson slides for whole-class instruction • 2 Math mats for small-group guided math instru
Review and practice subtracting decimals with this engaging 5th grade math lesson. Students use place value understanding, estimation, the standard algorithm, and addition to check subtraction to solve problems and determine if their answers are reasonable. Designed for small group instruction, this lesson helps students align decimals, regroup across place values, use addition to verify subtraction, analyze estimates, and explain their thinking.What's Included• 18 PowerPoint lesson slides f
This FREE 5th grade decimal operations quiz provides targeted practice with adding, subtracting, multiplying, and dividing decimals. Use it as a quick assessment, review activity, or test prep to check student understanding. This resource is part of:5th Grade Place Value Unit – Mini-Unit 3: Operations with DecimalsThis quiz aligns directly to the skills taught in Mini-Unit 3 and works well as a quick check or assessment. Skills Covered:• Adding decimals • Subtracting decimals • Multiplying de
This FREE 5th grade multi-digit multiplication and division quiz provides targeted practice with estimation, problem solving, and checking for reasonableness. Use it as a quick assessment, review activity, or test prep to check student understanding. This resource is part of:5th Grade Place Value Unit – Mini-Unit 2: Operations with Whole NumbersThis quiz aligns directly to the skills taught in Mini-Unit 2 and works well as a quick check or assessment. Skills Covered:• Estimating products and
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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