In "Nuclear Arthmetic," first-time physical scientists examine atomic structure and the periodic table of elements. The are given the formula, "N = A-Z," in which N is the number of neutrons, A is the atomic mass, and Z is the atomic...

Develop an understanding of positive and negative numbers using football. Pupils create a football field and game pieces. The teacher gives plays and the pupils move pieces to see who wins the game.

For this atom worksheet, chemists learn how to determine the number of protons, neutrons and electrons in an atom using the atomic mass and atomic number. They complete a chart of the subatomic particles and use marbles to represent...

Young scholars view a large illustration of a pizza with parts of velcro.  In this addition and subtraction of fractions lesson, students solve problems based on the pieces missing from the pizza. Young scholars take a fraction...

Lower elementary learners recognize solid shapes distributed for making fractions. Each individual uses a wheel and determine which part of a fraction is missing. This is a great lesson for your visual learners!

In this finding the missing numbers in patterns and sequences activity, upper graders read a series of one-digit, two-digit, and three-digit numbers to solve the problems. They solve 10 problems.

Which number comes next? The great part about this number sequencing worksheet is that it increases in difficulty so some learners who aren't challenged by the first few will definitely meet their match with the last couple. In each of...

No, you can't actually smell these 13 scratch-n-sniff stickers. But you can group them into equal groups of four, with one sticker remaining. Using that information, learners create a mixed number based on the improper fraction, 13/4.

In this counting exercise, learners write in the missing number in each series of numbers by counting up, with a range from 1 to 100.

In this ratios worksheet, students find the missing number in each ratio for numbers up to 10. Students complete 7 ratio problems.

In this addition worksheet, students complete number sentences with their missing addends with numbers less than 15. Students complete 10 multiple choice questions.

For this number chart practice worksheet, students review their counting skills as they fill in the 43 missing numbers between 0 and 99.

In this number chart practice activity, students review their counting skills as they fill in the 55 missing numbers between 0 and 99.

In this number chart practice instructional activity, students review their counting skills as they fill in the 57 missing numbers between 0 and 99.

In this missing addend worksheet, students fill in the missing addends to the problems where the answers are given. Students put numbers in place of cubes to create number sentences for 16 problems.

In this missing addend worksheet, students fill in the blank for the missing addend in the number sentence for answers 10 through 18. Students fill in 32 numbers.

In this missing addend worksheet, 2nd graders are given the sums of 8 or 9 and they have to write the missing addends to the addition problem given to them represented by cubes. Students complete 16 problems.

In this addition worksheet, 2nd graders find the missing addends. Students complete 32 problems filling in the missing digit for each.

In this missing addends worksheet, students figure out the missing addend to an addition problem based on the pictures given to them and solve the problem. Students solve 6 problems.

In this addition activity, students find the missing addends which add up to ten. Students complete 32 problems filling in the missing digit for each.

In this missing addend worksheet, students complete the missing addend for an addition problem making both sides of the equal sign equal. Students complete 6 problems.

In this addition skills worksheet, students solve 16 addition problems that require them to identify missing addends using the provided math counters.

In this addition activity, students complete problems with sums of eight and nie.  students solve 12 problems, solving for the missing addend in each.

For this addition practice worksheet, students solve 32 problems that require them to fill in the blanks in the addition trees with the appropriate missing addends.