Crazy fact: Some animals can survive months without oxygen. An online resource describes some unique ways animals collect oxygen and even live without it for an extended time. Learners read about these special animals and use pop-up...

Learners conduct a simulation to explore how scientists estimate the size of animal populations. They analyze a random sample and then extrapolate those results to a larger population. Additionally, they will apply the principals of...

In this connect the dots activity, learners create a whale by connecting the dots. Students do this for numbers 1 through 10.

In this mountain scene dot-to-dot activity, students draw lines to connect the numbers from one to fifteen and create a mountain scene.

In this lighthouse dot-to-dot worksheet, students connect the dots with numbers in order from one to twenty-one to draw a picture of a lighthouse.

In this coloring worksheet, learners color the stars that are all labeled with a number according to the color key for numbers 1 through 10. Students color 18 stars total.

In this color the moons 1-15 worksheet, student color the moons according to the color chart given using five different colors.

In this squares instructional activity, students can either count the squares or cut the squares on this sheet. Students cut or count 15 squares.

In this triangles worksheet, students can cut out or count the triangles given to them. Students cut or count 13 different colored triangles.

In this place value worksheet, students count base 10 squares, counting tens first, then ones. Students write the total amount counted. A reference web site is given for additional activities.

In this place value lesson, students use number cubes to improve their counting skills. Students count the number of squares in each box to study place value for tens and ones. Students complete 9 problems.

In this place value learning exercise, students count tens and ones shown in pictures and words, put them together and write totals, then do the same for problems stated in words. A reference web site is given for additional activities.

In this place value with tens and ones worksheet, student count the number of tens and ones in six addition problems and write the value and the answer, then use place value to answer 12 addition problems.

In this place value worksheet, student count the number of tens and ones, write out each value, and add them up. Students complete 6 problems like this, and 12 more where they simply add the two numbers together.

In this addition activity, learners complete a set of 20 problems, adding to number 12. A reference web site is given for additional activities.

In this addition worksheet, students solve the horizontal addition problems. Students count on from the addend given to get the find the missing addend.

In this addition worksheet, learners complete a total of 24 problems, filling in missing numbers, either addends or sums. A reference web site is given for additional activities.

In this addition instructional activity, students complete a total of 24 problems, adding number to 12. A reference web site is given for additional activities.

For this addition worksheet, students add numbers up to 12 in this addition chart. Students complete 2 charts where they add the horizontal number with the vertical number.

In this addition worksheet, learners complete 12 problems, adding 2-digit numbers. Problems do not require carrying. A reference web site is given for additional activities.

In this addition worksheet, students complete a set of 12 problems, adding one 2-digit number to another, no carrying. A reference web site is given for additional activities.

For this column addition with two digits worksheet, 1st graders write out twelve horizontal addition problems in columns and then work them out.

In this column addition instructional activity, students put two digit addition problems from horizontal to vertical and then solve. Students complete 12 addition problems.

In this subtraction worksheet, students subtract numbers 0 through 12. Students complete 20 subtraction problems for numbers 0 through 12.