Browse Worksheets

Cell theory

Biology

Over 350 years ago, there was no knowledge about cells. But with the invention of the microscope, the cells were discovered.

The cell was first discovered and named by Robert Hooke in 1665.

Create and Customize Worksheets for Every Classroom

LiveWorksheets makes it easy for teachers, parents and homeschool educators to design and deliver engaging learning materials. Upload a PDF or start from scratch to create what you need: anything from interactive math worksheets to reading comprehension worksheets, multiplication worksheets, and kindergarten worksheets in just a few clicks. Our drag-and-drop editor works across all grade levels and subjects, so you can tailor content to your lesson plans, homework, or assessments. ESL teachers can also build custom ESL worksheets, add a common sound chart, or integrate ESL activities to make each class more engaging. Easily create differentiated, auto-graded activities that save valuable time and support better student learning.

A Complete Library of Learning Resources for K-12 and ESL

Access thousands of ready-to-use worksheets across K-12 subjects, including kindergarten worksheets, math worksheets, multiplication practice, reading comprehension exercises, and ESL resources. Filter by grade, subject, or skill level to find exactly what you need, whether it’s for an elementary classroom, middle school review, or high school practice. ESL teachers can explore our growing collection of ESL worksheets and English as a Second Language activities designed to support all levels of learners. With new content added regularly, LiveWorksheets is a flexible resource that helps build lasting learning outcomes.