Proving microscopic structures exist is a difficult task. Learn how scientists did just that in the mid-1800s as they set out to identify the cellular structures related to genetics. The online lesson explains the collection of work that...

In this magnetism worksheet, students answer ten questions about magnets, their magnetic poles, the magnetic lines of flux and how magnets work.

In this ecological dilemmas in wetlands instructional activity, students select a topic, use  the links to websites for research, describe the topic, explain its impact on wetlands, identify alternatives and decide on possible...

In this database worksheet, learners follow directions on how to make their own database. Students complete 3 steps total.

In this resistance worksheet, students solve 10 problems about the changes in resistance as the temperature changes in resistors.

In this electrical worksheet, students interpret schematics to answer a series of 31 questions about mixed frequency signals. This worksheet is printable and the answers are available on-line.

For this electrical worksheet, students draw a schematic design and build a circuit board to grasp the understanding of DC circuits before answering a series of 5 open-ended questions. There are no schematics available for the design or...

Here is an online quiz, complete with answer links. High schoolers respond to nine short answer questions about Joan of Arc, her battles, and even the voices in her head. The best part, they can check their own answers.

In this mammals worksheet, students click on the links in the questions about mammals to find the answers to the questions and then come back and answer the questions. Students answer 8 questions total.

In this words stating with E worksheet, students complete multiple choice questions where they fill in the blanks to sentences with words starting with the letter E. Students complete 20 questions.

In this online interactive history quiz instructional activity, students respond to 10 short answer and essay questions about the life and accomplishments of Isaac Newton.

In this bats worksheet, students click on the links in the questions about bats to find the answers to the questions and then come back and answer the questions. Students answer 19 questions total.