Students have different optimal learning styles. Psychologists use at least eight main learning theories to explain why including andragogy, action, cognitive-gestalt, experiential, facilitation, holistic, reinforcement and sensory stimulation. Students can benefit from these theories by taking online learning-style inventories. Teachers can print out these inventories so teachers, students and parents know how to optimize students' learning.

Memletics Learning Styles Inventory

Young girl taking an online test.

Learning Styles Online gives this free inventory, which defines and measures seven different learning styles: visual, aural, verbal, physical, logical, social and solitary. Students can take this inventory online, or the teacher can download it in Microsoft Excel or Adobe PDF formats. The free version shows individual test results, but teachers must pay $9.95 for the standard version as of 2010 to print out reports with whole-class results.

Hemispheric Dominance Inventory

Human brain hemispheres.

Two hemispheres, or half-spheres (sides), make up the human brain. Humans use the left side to think logically and the right side to come up with ideas (intuition). Middle Tennessee State University's free online test measures which side you tend to rely on, and then the site recommends learning strategies geared toward your dominant hemisphere. Results are individual and unprintable.

The Personal Learning Styles Inventory

Students in science class learning visually and kinesthetically.

This free online inventory tells an individual how much of his learning style is visual, auditory or kinesthetic. Each student can print out her own inventory results for free, though the results page does contain an advertisement. For $995, a school can buy the right to print out as many inventories as it wants for a year.

Free Printable Inventory Worksheet

Results of test on clipboard.

Ageless Learner's free, printable inventory worksheet measures the degree to which a student uses visual, auditory or tactile learning styles. It includes a definition of learning styles and different strategies to optimize learning for each of the three addressed styles.