# Class I Resources

The following list of online resources are provided as a sample of curated resources. New resources shall be added as we come across interesting and relevant online materials.

#### 1. Comparing Sets

Description: The link provides an introduction to sets.

Core Concepts: Sets are collections of distinct objects, numbers, or elements that share common characteristics.

Description: The video link explains how to use the terms ‘more’, ‘fewer’ or ‘the same’.

Core Concepts: Video on comparing Sets.

Description: Live-worksheet to check the understanding of comparing sets.

Core Concepts: Worksheet to compare sets.

#### 2. Counting Numbers till 500

Description: A brief history of numbers and counting.

Core Concepts: Over time, civilizations advanced math concepts and techniques, evolving numerical notation, arithmetic, and mathematical thinking.

Description: The link emphasizes understanding concepts like pre-counting, one-to-one counting, and counting sets to develop advanced math skills. It also offers teaching strategies to support children’s learning at each stage.

Core Concepts: Information link that outlines the early learning progression in number skills for young children.

Description: An educational song that helps children count from 1 to 100, featuring catchy music and colorful animations to engage young learners.

Core Concepts: Video link on counting numbers till 100.

Description: The video link helps to recollect the numbers through a song.

Core Concepts: Video link on number song..

Description: The video is about chanting numbers, likely designed to help children learn and practice counting through repetitive and rhythmic chanting.

Core Concepts: Video link on chanting numbers to help number recognition.

Description: The video teaches counting from 1 to 500 using visuals, repetition, and other techniques to aid memorization and understanding for learners.

Core Concepts: Number count video from 1-500.

#### 3. Representing Numbers Concretely till 100

Description: Information link that covers various aspects of numbers, including their definitions, properties, and significance in different fields such as mathematics, science, and everyday life.

Core Concepts: Introduction on representing Numbers.

Description: The link leads to an educational activity website  with a lesson on writing numbers up to 100 by tens.

Core Concepts: Writing number names activity.

#### 4. Ordinal Numbers: Recognizing Ordinal Numbers from 1st till 20th and Sequencing Real Life Events

Description: The link directs to an article on "The Word Detective" website, discussing the origins or meanings of words related to ordinal numbers like "first," "second," and "third.".

Core Concepts: “First,” “second,” “third,” “fourth” and so on are called “ordinal numbers,” terms defining a thing’s place in a series.

Description: The link is for the Wikipedia page on ordinal numerical competence, discussing the understanding and use of ordinal numbers and representing the order or position in a sequence.

Core Concepts: Ordinal numerical competence is the ability to count objects in order and to understand the greater than and less than relationships between numbers.

Description: The link directs to interactive activities designed to teach and reinforce the understanding of ordinal numbers, which indicate the order or position of objects in a sequence.

Core Concepts: Ordinal numbers (Up to 20).

Description: The video teaches ordinal numbers, explaining their use in sequences like "first," "second," "third," with examples and exercises for effective learning.

Core Concepts: Video lesson on ordinal numbers up to 20.

Description: The given URL link contains a live-worksheet to practice matching ordinal numbers with words.

Core Concepts: Live Worksheet on ordinal numbers (matching).

Description: The link is a PDF on ordinal numbers, featuring activities to teach and practice the concept, indicating the order of objects in a sequence.

Core Concepts: Ordinal Numbers (Printable sheet for Game-Put Me Together).

#### 5. Estimating Amounts to 20

Description: The link leads to the Wikipedia page on estimation. This page likely covers various aspects of estimation, including its definition, techniques, and applications in different fields such as mathematics, statistics, and everyday life.

Core Concepts: Estimation (or estimating) is the process of finding an estimate or approximation.

Description: The link directs to an article on "Psychological Science" discussing the early development of estimation skills.

Core Concepts: Article on estimating quantities, sizes, and other attributes.

Description: Video link to practice estimating everyday objects.

Core Concepts: Video on estimation.

#### 6. Counting 2-Digit Numbers

Description: The research link provides an introduction to skip counting.

Core Concepts: Skip counting.

Description: Video tutorial on the concept of skip counting. It includes demonstrations, examples, and exercises to help learners practice counting by multiples of 2.

Core Concepts: Skip count by 2s.

Description: The video link explains the skip counts by 5s.

Core Concepts: Skip count by 5s.

Description: The video link leads to skip counting by tens and helps to practice skip counting skills.

Core Concepts: Skip count by 10s.

#### 7. Place Value (2-Digit numbers): Identifying the Value of Digit Placement, Using Base Ten Block Models and Place Value Patterns

Description: The link leads to a website discussing the importance of place value. It explores how understanding place value is crucial for foundational math skills and concepts, offering insights and resources for educators and learners.

Core Concepts: Place Value is the position of a number that tells what value it is assigned, and is vital in our communication of math as a universal language.

Description: Video link explaining how to group numbers.

Core Concepts: Place Value Grouping.

Link:   Video on place value grouping

#### 8. Comparing 2-Digit Whole Numbers

Description: The research link helps to understand the benchmarks in mathematics, particularly in the context of number sense.

Core Concepts: Benchmarks serve as reference points for estimation and comparison.

Description: The research link includes strategies and techniques for comparing numerical values, such as using symbols like greater than (>), less than (<), or equal to (=), as well as understanding concepts like place value and number magnitude.

Core Concepts: Number sense is the ability for a student to recognize a number, its value and its relationship with other numbers.

Description: The video link shows how to compare numbers using the number line and counting tens.

Core Concepts: Comparing and Ordering using Number Line and Counting Tens.

Description: This video explains the comparison of numbers using symbols.

Core Concepts: Less than (<), Greater than  (>),  equal to  (= ).

Description: Online worksheet to practice number comparison using symbols.

Core Concepts: Comparing numbers worksheet.

#### 9. Fractional Parts: Equal Shares, Partitioning, One by One and Exploring ‘Halves’.

Description: The Wikipedia page on "Fraction" explains that fractions are mathematical expressions representing the division of one quantity by another and describes types such as proper fractions, improper fractions, and mixed numbers.

Core Concepts: A fraction represents a part of a whole or, more generally, any number of equal parts.

Description: The link shows how to represent halves using concrete objects and how it is written symbolically (1/2).

Core Concepts: These real-life examples of halves engage children and show the practical use of math in daily life.

Description: The video link helps to identify and name a half as one of two equal parts of shapes.

Core Concepts: Finding half of the shape.

Description: An online worksheet to help identify halves.

Core Concepts: The two-dimensional shapes that are symmetric can be divided into halves.

#### 10. Addition: Developing the Meaning of Addition, Recognizing the Commutative Property, Exploring Strategies for Finding Sums till 20 and Recording Addition

Description: The research page on addition offers a detailed explanation, highlighting its importance in arithmetic and providing methods and strategies for effective learning.

Core Concepts: Addition is the process of adding two or more items together. Addition in Maths is the method of calculating the sum of two or more numbers.

Description: This link page on addition explains the basics, including simple and column addition, with practical examples for everyday use. It provides step-by-step guides and practical applications like calculating distances and money.

Core Concepts: Addition is the term used to describe adding two or more numbers together. The plus sign ‘+‘ is used to denote an addition: 2 + 2.

Description: The video link explains double facts through a song.

Core Concepts: When we add two of the same number, we add using the “doubles fact”. For example, 1 + 1 and 2 + 2 are both double facts.

Description: The video link explains how to ‘make a 10’ strategy for addition.

Core Concepts: The “making 10 strategy” involves changing one of the numbers in an Addition problem into the number 10 in order to make the calculation easier.

#### 11. Subtraction

Description: This video helps to learn Subtraction For Numbers 1 to 9.

Core Concepts: Subtraction is the process of taking away a number from another. It is a primary arithmetic operation that is denoted by a subtraction symbol (-) and is the method of calculating the difference between two numbers.

Description: The video link shows how to subtract using fingers.

Core Concepts: This technique helps students develop habits to solve subtraction without relying solely on memory. Instead, they use their fingers as a guide and reminder.

Description: The video link shows different ways to subtract.

Core Concepts: Different ways to subtract: Counting Back (or Up), Number Grids, Base Ten Blocks, Open Number Line.

Description: The online printable worksheet encourages practice of subtraction by taking away objects.

Core Concepts: Subtraction as taking away.

Description: This worksheet helps learners to practice counting back to subtract.

Core Concepts: Backward counting is simply counting down by one at a time. It's like pulling balls out of a jar to find out how many are left. This method helps kids easily improve their number skills.

#### 12.Addition and Subtraction Facts: Exploring the Relation Between Addition and Subtraction, Representing Addition and Subtraction Facts, Using Patterns to Solve Addition & Subtraction

Core Concepts: If we add one number, then subtract the same from the obtained result, they cancel each other.

Description: The video link showcases the concept of addition and subtraction Fact Families.

Core Concepts: In addition and subtraction, a fact family consists of three numbers that complete four equations, two addition and two subtraction.

#### 13. Mental Strategies: Sums & Differences to 10

Description: The link leads to an article titled "3 Benefits of Mental Math". It discusses the advantages of developing mental math skills.

Core Concepts: Mental math refers to doing math calculations in your head without the use of tools such as calculators, pen and paper, or abacus.

Description: The video link helps to learn mental subtraction using counting on and counting backward.

Core Concepts: Counting on and counting backward.

Description: The online worksheet facilitates the practice of solving word problems using mental math techniques.

Core Concepts: Word problems on Addition and Subtraction.

#### 14. Copy, Extend and Create Patterns

Core Concepts: A pattern is a repeated arrangement of numbers, shapes, colors and so on. The Pattern can be related to any type of event or object.

Description: The worksheet assists in recognizing the following image and creating patterns.

Core Concepts: A growing pattern is the one which increases or decreases by a constant unit.

Description: The worksheet enhances the understanding of growing and repeating patterns.

Core Concepts: Repeating patterns are patterns where a group of elements repeat themselves as the pattern extends. Some examples of repeating patterns are: ABABABAB… AABAABAABAABAAB… ABCCABCC

Link: Growing and Repeating patterns worksheet

#### 15. Place Value Patterns

Description: This article discusses the significance of understanding place value in mathematics education.

Core Concepts: Place value is the foundation of every math concept from preschool to algebra level math and is essential for a complete mathematical understanding.

#### 16. Measurement: Concept and Principles and Measuring Length using Non-Standard Units

Description: The link leads to an article discussing the historical methods and units of measuring length used in ancient civilizations.

Core Concepts: Ancient measurement of length was based on the human body.

Description: The video link shows how to use non-standard units for measuring length.

Core Concepts: Some of the non-standard units of length are handspan, foot span, finger width, a thread or a rope, etc.

Description: The given link provides educational content explaining the concept of mass in a way that is understandable and engaging for children.

Core Concepts: Mass is the quantity of matter within a given object.

#### 17. Area

Description: This link leads to a website, specifically focusing on math vocabulary related to geometry, particularly the concept of area. It provides definitions, explanations, and examples to help learners understand area-related terms and concepts.

Core Concepts: Area is the total space taken up by a flat (2-D) surface or shape of an object.

#### 18. Time: Compare Time Duration and Reading Time by Hours

Description: The video helps to read time based on an hour and minute hands on an analog clock.

Core Concepts: Telling time to the hour.

Description: The YouTube video helps kids learn to tell time, covering analog and digital clocks, hours, minutes, seconds, and fun time-telling activities.

Core Concepts: Telling time.

Description: This link directs to a worksheet to practice telling time. The worksheet includes exercises to help children learn to read analog clocks and understand the concept of time.

Core Concepts: Telling time.

#### 19. Spatial Sense: Visual Memory and Figure-Ground Perception

Description: This given link helps explore the concept of figure-ground perception, which relates to how we perceive objects in the environment by distinguishing them from the background.

Core Concepts: A person's ability to separate an object from its surrounding visual field is referred to as figure-ground perception.

Description: The video helps to create awareness on spatial sense through a game.

Core Concepts: Spatial awareness is the ability to understand the relationship between one's movements and the objects in one's surrounding environment.

#### 20. 3-D & 2-D Shapes

Description: The research link provides information, resources, or activities to help learners explore the historical development of geometry concepts and theories.

Core Concepts: The word geometry means to “measure the earth” and is the science of shape and size of things.

Description: The video helps to learn and sing along to the song of 3-D shapes.

Core Concepts: 3D geometric shapes are solid shapes that have three dimensions, length, width, and height.

#### 21. 2-D figures on 3-D Shapes and 2-D & 3-D Shapes in the Environment

Description: This link leads to an educational resource to help learners identify and describe plane shapes present in everyday objects.

Core Concepts: A closed two-dimensional or flat surface figure is known as a plane shape.

Description: The link is a video song which helps learners to make connections with the real world.

Core Concepts: 3D shapes can be seen all around us. We can see a cube in a Rubik's Cube and a die, a rectangular prism in a book and a box, a sphere in a globe and a ball.

#### 22. 2-D Shapes: Combining Shapes and Subdividing Shapes

Description: The video link helps learners understand how to combine and subdivide 2-D shapes or plane figures.

Core Concepts: Combining and Subdividing Plane Figures.

Link: Video on combining and subdividing

#### 23. 2-D Reflective Symmetry

Description: This link provides explanations, examples, or exercises to help understand how symmetry applies to practical scenarios.

Core Concepts: Symmetry is defined as an identical and a balanced similarity, which is found in two halves of an object i.e. one-half, is the mirror image of the other half.

Description: Video link explaining symmetrical, Asymmetrical Figures and line of symmetry.

Core Concepts: If something is asymmetrical, its halves are not mirror images of each other.

Description: The video link illustrates symmetry and presents real-life examples to explain the concept.

Core Concepts: Many things in our daily life use symmetry: roads, architecture, train tracks, seesaws, flowers, steering wheels, even our faces are examples of symmetry.

#### 24. Collecting Data

Description: The video lesson teaches how to draw tally marks.

Core Concepts: In tally marks, the number 5 is written with four vertical lines and a fifth line across the previous four lines.

Description: The video teaches how to use a tally chart for recording data.

Core Concepts: Tally marks are calculated and expressed by vertical lines. They are clustered in groups of five for readability.

#### 25. Graphs: Creating Concrete Graphs and Interpreting Picture Graphs

Description: The video highlights how to make concrete graphs.

Core Concepts: A concrete-object graph is a graph that records, organizes, and displays data using objects on a mat with appropriate labels.

Description: The video lessons help to classify and sort data to create a graph.

Core Concepts: Data sorting is organizing information in a way that makes it easier to understand, analyze, or see patterns.

Description: The video link explains how to represent data using a pictograph.

Core Concepts: Pictograph is a method to represent the data using images.

Description: Live worksheet to check the understanding on pictograph.

Core Concepts: Pictograph practice.

#### 26. Probability of Everyday Events

Description: This link provides information about probability. It covers the definition, history, key concepts, and applications of probability in various fields.

Core Concepts: The probability of an event is the likelihood that the event will happen.

Description: This link directs to a website that explains the concept of probability. It offers a detailed definition and discusses how probability is used in research and other practical applications.

Core Concepts: Probability of everyday events.

Description: The video teaches how to use probability language to describe future events.

Core Concepts: ‘Certain’ is something that's definitely going to happen. ‘Impossible’ is something that's definitely not going to happen. ‘Possible’ describes something that might happen.

Description: The video helps predict future events using probability language.

Core Concepts: Probability Language.