Worksheet
Math Salamanders Ltd.

Column Subtraction Two Digits Sheet 3

For Students 3rd - 4th Standards
In this column subtraction with two digits worksheet, students use borrowing or regrouping to complete twelve two-digit problems.
Worksheet
Curated OER

Addition - Up to 20 Sheet 1

For Students 2nd - 3rd Standards
For this addition activity, students practice their addition with one- and two-digit numbers. Students complete the activity by solving twenty-five addition problems.
Worksheet
Math Salamanders Ltd.

Addition - Up to 20 Sheet 2

For Students 2nd - 3rd Standards
In this addition activity, learners practice their addition skills. Students complete the activity by filling in the missing number in each of the forty addition problems.
Worksheet
Math Salamanders Ltd.

Column Addition - 3 Digits Sheet 1

For Students 2nd - 4th Standards
In this addition instructional activity, students add three-digit numbers together. Three problems have the students adding three three-digit numbers together. The students work through 15 problems.
Worksheet
Math Salamanders Ltd.

Column Addition - 3 Digits Sheet 4

For Students 3rd - 4th Standards
In this column addition with three digits activity, students solve fifteen addition problems using carrying when needed; some of which have three addends.
Worksheet
Math Salamanders Ltd.

Column Addition - 3 Digits Sheet 6

For Students 2nd - 4th Standards
In this addition worksheet, students complete a set of 12 problems, adding two- and three-digit numbers. Numbers must be arranged vertically and problems completed. A reference website is given for additional activities.
Worksheet
Math Salamanders Ltd.

Counting on by 1's, 2's, 5's, 10's, and 100's Sheet 2

For Students 2nd - 3rd Standards
Students count by either one, two, five, 10, or 100 as instructed. A website reference for additional resources is provided.
Worksheet
Math Salamanders Ltd.

Counting on by 1's, 2's, 5's, 10's, and 100's Sheet 3

For Students 2nd - 3rd Standards
Students count on by one, two, five, 10, or 100. A website reference for additional resources is provided.
Worksheet
Math Salamanders Ltd.

Counting Back by 1s, 2s, 5s, 10s, and 100s Sheet 3

For Students 2nd - 3rd Standards
Students count back by ones, twos, fives, 10s, or 100s as instructed. A website reference for additional resources is given.
Worksheet
Curated OER

Counting On and Back by 1s, 2s, 5s, 10s, and 100s Sheet 1

For Students 2nd - 4th
Students count on and back by ones, twos,10s, or 100s. A website reference for additional resources is provided.
Worksheet
Curated OER

Counting On and Back by 1s, 2s, 5s, 10s, and 100s Sheet 3

For Students 2nd - 3rd Standards
Learners count on or back by ones, twos, fives, 10s or 100s. A website reference for additional resources is given.
Lesson Plan
Curated OER

Amphibian Spawns

For Teachers K
Students observe tadpoles as they gradually change into adults.  In this amphibian biology lesson plan, students watch tadpoles in a tank in the classroom, keep a daily record of what they observe, and chart the growth development...
Lesson Plan
Curated OER

Ecology - Reproduction and heredity

For Teachers 9th - 11th
Students correlate signs of spring with reproductive strategies of varioius organisms. They describe how organisms inherit traits from generation to generation.
Lesson Plan
Curated OER

Power Point Lesson Plan

For Teachers 6th - 8th
Students create a multimedia animal research presentation based on the include criteria for both information and sideshow format. They follow directions on slide set-up from creating a slide to transitions and musical insertion.
Lesson Plan
Curated OER

Frogs Losing Ground

For Teachers 6th - 8th
Middle schoolers explore an exhibit through an interactive program on frogs. They can listen to the different sounds frogs make and the different types of frogs. They search for the types of frogs they find in their local area.
Lesson Plan
Curated OER

Where Do I Belong?

For Teachers 4th
Fourth graders work in groups. They are given magazines. Students cut pictures of five mamals, five birds, five reptiles, five amphibians, and five fish. They place the pictures in a plastic bag. Students switch bags. They are explained...
Lesson Plan
Curated OER

Natural Selection

For Teachers 9th - 12th
Students estimate how many different species of organisms inhabit the Earth. In groups, they match the pictures of embryos at the different stages of development. They compare and contrast animals from the sky, land, and water and...
Lesson Plan
Curated OER

You...Instead of the Onion Skin

For Teachers 2nd - 8th
Students observe their own epithelial cells from the inside linings of their cheeks using DigiScope technology. They prepare a slide with both onion cells and epithelial cells and make an illustrated booklet for a PowerPoint presentation...
Lesson Plan
Curated OER

Frog and Toad are Friends

For Teachers 1st - 2nd
Students view a 30-minute video lesson plan to discover information about the characteristics of frogs and toads. They then transform themselves into frogs and participate in a Jumping Frog Jubilee. They work in groups of three to...
Worksheet
Curated OER

Examining the Stages of Ecological Succession

For Students 9th - 12th
In this ecological succession worksheet, high schoolers answer questions about the process of succession in four ponds given diagrams and descriptions.
Lesson Plan
Curated OER

Animals and Their Coverings

For Teachers 8th - 10th
Students investigate the coverings of vertebrates and invertebrates and cold-blooded and warm-blooded animals. In this animals and their coverings lesson plan, students observe displays of different animals and discuss and answer...
Lesson Plan
Curated OER

Life Means Water Environment

For Teachers 8th - 10th
Students investigate pH levels in bodies of water and experiment with acid/base reactions. In this water and pH lesson, students observe changes in pH levels of a sample solution and observe a Bronsted-Lowry reaction. Students...
Lesson Plan
Curated OER

Dress Like A Frog

For Teachers K - 6th
Young scholars recognize amphibian adaptations. In this amphibian lesson students explore amphibian adaptations that provide for successful living in their environments. A volunteer dresses up with all of the adaptations using everyday...
Lesson Plan
Curated OER

Web of Life Game: Trout

For Teachers 5th - 6th
Students explore the concept of food webs.  In this food web lesson, students demonstarte the connection between species.  Students use a ball of string show how the food web works, then have a class discussion. 

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