Reinforce the concept of one-to-one correspondence with a Valentine's Day-themed counting and color sorting activity. Scholars sort foam hearts by color—red, orange, yellow, green, blue, and purple—then count and place them on a number...

One-to-one means the answer is simple, right? Given four graphs, pupils use a vertical line to test each graph to find out if they are one-to-one. By using the resource, learners realize that not all one-to-one relations are functions....

Is the inverse of a function also a function? Pupils manipulate the graph of a function to view its inverse to answer this question. Using a horizontal and vertical line, class members determine whether the initial function is...

Investigate the definition of inverse functions graphically. Using the interactive, scholars create a graph of a function and view its resulting inverse. They then determine whether a group of functions have inverses that are also...

Inject a great interactive into your lesson plans. Scholars learn about injections, surjections, and bijections of sets. They use an interactive that shows an example for each of these relationships between sets.

What's larger than infinity? Infinity plus one! Scholars learn about the different levels of infinity in the video that uses bijections as a way to show infinite sets as being the same size. They also and see that the  set of real...

Let's get the herd to follow the rules. The activity associated with the second lesson in the unit introduces the class to the definition of a function. Individuals must gather in groups of zebras and rhinos defined by the general...

Reinforce number sense with a collection of math lessons for kindergarteners through fifth graders. Young mathematicians take part in hands-on activities, learning games, and complete skills-based worksheets to enhance proficiency in...

Functions are special relations, but are there special functions? A concept video defines a one-to-one function. Three problem videos cover examples in determining whether a relation is a function and whether it is a one-to-one function.

Do you want to play a little one-to-one? Learn to determine algebraically if a function is one-to-one. Work through two examples using the video as a guide. 

An understanding of the basics of a function is key to success in upper-level math courses! A video describes in detail the important aspects of functions including domain, range, combinations, compositions, and vertical line test. 

Kindergartners jump right into learning. Each lesson in this math unit is clearly outlined with materials, procedures, student outcomes, misconceptions, and solutions. All lessons and activities are aligned with Common Core math standards.

Track how well your learners can count to 5 and 10 with a set of counting trial sheets. As you prompt kids to count how many items they see, mark the number they reach correctly using 1:1 correspondence. 

Engage young mathematicians in building their number sense with this set of ten frame printables. Whether you're teaching pupils how to count, add, or subtract, these tools offer children tremendous support with developing their basic...

Young children will have a blast learning how to count these monster math manipulatives. Provided with a series of boxes numbered from 1 to 10, learners must place the correct number of monsters in each space to demonstrate their ability...

It's never too early to begin a child's math education. This collection of fun hands-on activities engage youngsters in building their number sense as they learn how to count objects, identify numerals, compare amounts, and much more.

How can you tell if a number of items is reasonable? Combine math and language arts with a fun lesson plan based on Jeff Shepard's The Right Number of Elephants. After reading the book, kids discuss amounts of other items and create...

Build each letter of the alphabet and more with Cuisenaire rods! Kids first practice with simple letters and then get to put together items that start with each letter. Along the way, they practice counting, using certain colors, and more!

Jump start children's math education with this fun basic skills resource. Offering dozens of different touch-and-swipe activities with colorful graphics, this program is perfect for all young learners.

Do your students have what it takes to be the king of math? Find out with this fun skills practice game that covers a wide range of topics from counting and basic operations to measurement and fractions.

A daily counting routine builds a caterpillar with 100 body segments (marked with symbols to indicate 2s, 5s, and 10s) by the 100th day of school. Provides structured repetition as part of the morning routine so that by 100th day,...

Students use manipulatives to establish quantity. By singing a song titled "Five Little Cookies," students determine which strategy to use to find out how many cookies are left in the bakery shop.

In whole group practice, children count together and identify how many objects are drawn on butcher paper, increasing the number when they have achieved fluency. In pairs, they count manipulatives. They then copy series of numbers from...

Emergent math masters practice 1:1 correspondence, number recognition, and quantity-to-number relationships. They view number flashcards, state the correct number name, and circle the corresponding numeral to represent the number of...