In this college level Pre-Calculus worksheet, students use the double-angle and half-angle formulas to evaluate trigonometric expressions and solve trigonometric equations. The six page worksheet contains fifty-six problems. Answers are...

A fabulous instructional activity on fractions awaits your young mathematicians. In it, learners are invited to explore the world of fractions by accessing websites that have educational activities and worksheets embedded in them. Some...

Young scholars solve six problems in which they write the time (to the hour) that each clock shows. Then, everyone matches six clocks with the correct times by drawing a line to match. A good, solid worksheet.

These monsters are only half-drawn! Challenge scholars to observe the line of symmetry and draw in the other half to reflect the first half. There are six simple monsters in all, and scholars can color them in once finished (encourage...

In this oxidation/ reduction activity, students solve eight multiple choice problems related to redox reactions. They determine half reactions, they calculate standard cell potentials, they identifying oxidizing and reducing agents and...

Use this introductory geometry worksheet as a projected warm-up for your class, doing it together and then revealing the explanation on the bottom half. Learners examine a square and a circle, each bisected by a dotted line. They must...

In this half reactions activity, high schoolers read about redox reactions and learn how to write half reactions showing the oxidized part of the reaction and the reduced part of the reaction. Students are given 10 redox reactions and...

In this telling time worksheet, students read the hands on analog clocks and write the times to the half-hour filling in the blanks for half past blank and with the hour, colon, and minute numbers. Students solve 8 problems.

For this standard measurement worksheet, 3rd graders measure pictures of 5 objects to the nearest half inch. They measure pictures of items such as scissors, a pencil, and a crayon.

In this telling time worksheet, students solve 9 problems in which an analog clock is analyzed. Students write the time to the nearest half hour.

The experiment known as one of the most beautiful experiments in biology changed the way we think about DNA. Learn about the experiment and the scientists who designed it—as well as the scientists who built on the results—with an online...

How do you find a quarter of a given number? The class will see how easy it can be, as they first find 1/2 of a given set of numbers. They are then encouraged to find 1/2 again, which of course is 1/4. A great strategy for learners just...

Learners investigate exponential decay.  Students explore the biological half-life of Cesium-137.  Learners investigate the Goiania Accident of 1987 which is considered one of the worst incidents in the history of the Atomic...

Eighth graders use M&M's to experiment with data. They use a graphing calculator to determine the best equation for their data; linear, quadratic or exponential. They analyze the data to find the half-life of their M&M's.

In this counting halves worksheet, students practice counting grapefruit halves out loud with a partner for mastery of counting halves.

In this time activity, 2nd graders write the time that are shown on 12 analog clock faces. They identify time to the half hour.

In this telling time to the half-hour worksheet, learners read the hands on analog clocks and write the times in numbers using the hours, colons, and minutes. Students solve 11 problems.

In this counting pennies worksheet, students count the number of pennies shown in 7 sets and then identify the amount of half of the pennies shown.

In this balancing oxidation-reduction reactions, students learn how to assign oxidation numbers to atoms in compounds, they learn how to write half reactions in order to balance oxidation-reduction reactions in acidic or neutral...

Visual models support young mathematicians as they deepen their fractional number sense in this elementary math instructional activity. Using fraction circle manipulatives, children explore basic unit fractions as they develop...

Lead your class through the amazing world of isotopes as they investigate the various properties they contain and further understand their respective location on the periodic table. They explore half-lives and radioactivity as each...

Use number lines to give kids a visual representation of various fractions. There are eight number lines provided, and each one grows in difficulty. The first one, for example, only has three points: zero, one half, and one. The last...

Students explore tessellations. In this shapes and geometry lesson, students describe the attributes of many of the shapes displayed on an Elmo. Students create examples of tessellations using pattern blocks.

The National Chemistry Olympiad exams are comprehensive tests covering an entire  year of chemistry concepts. You can use them as practice for competing in the challenge, or simply as a review, or as an actual final exam for your...