Mini lessons are provided for learning concepts in the world of probability and statistics. Topics include counting and probability, permutations, combinations, independent and dependent events, and distributions. Links to online...

This entry from an online English-grammar book discusses phrases, the structure of phrases, types of phrases, and provides an exercise for each section. In the top right corner, click on the page numbers 1-5 to follow through the...

Tutorial on DNA basics that goes along with an online quiz over the material. Use the naviagation buttons at the bottom of the page to go to the quiz over the material.

Has explanations, illustrations, and a Quick Time movie to download. Also contains practice test questions that are answered online.

This site is provided for by the Colby College. Practice with several different examples of regular and irregular comparisons of adverbs, verbs, nouns, and adjectives. Read the sentences and select the correct comparative. Help is given...

This site is an explanation of stem-changing verbs with a focus on verbs that stem-change from e to ie. A short test at the end of the lesson tests the student's mastery of this grammar principle.

This site is an explanation of stem-changing verbs with a focus on verbs that stem-change from e to i. A short test at the end of the lesson tests the student's mastery of this grammar principle.

This site is an explanation of stem-changing verbs with a focus on verbs that stem-change from o to ue. A short test at the end of the lesson tests the student's mastery of this grammar principle.

This review of regular and irregular Spanish verbs features charts for the preterite tense, including stem-changers and spelling changes.

These exercises provide a very extensive review of irregular verbs, stem-changers, and spelling changes in the preterite tense. Conjugate verbs to match the subject. Answers may be checked and corrected.

This exercise for practicing the preterite and imperfect tenses has you watch a video of a hotel receptionist who describes a frightening experience on the job. Then you complete the story by filling in blanks with preterite and...

Completion of these twenty-four clauses provides an extensive review of regular and irregular verbs, stem-changers, and spelling changes in the present subjunctive tense. Verb infinitives are provided that need to be conjugated in the...

This site provides music theory information on such topics as rhythm, intervals, scales, chords, etc. Also, there is a fine section which describes the basic concepts of form and structure.

This introduction to the present tense conjugation of the irregular verbs "dar", "ir" and "estar" is easy to understand and includes a short test at the end to test the student's mastery of this grammar principle.

Practice using commas as you complete this exercise, which requires you to know your comma rules.

At this site from the Colby College, students will be able to listen to a reading of a poem, practice conditional tenses and learn about "if clauses."

This resource helps users figure out how to make track changes in Microsoft PowerPoint. (applies to PowerPoint 2013 and 2016)

From the Purdue University Writing Lab, this is an exercise to practice using numbers in writing. Answers are from a link at the bottom of the page.

Print out these five exercises covering countable and noncountable nouns. Link to answers provided.

The home of Macromedia Flash software, this site offers a wealth of information and material regarding Flash. Content includes pricing, information on features, system requirements, tutorials, samples, documentation, online forums, and...

A short automated quiz that tests the student on the preterite and stem changing verbs. The quiz displays one question at a time and when you've answered it the next question appears.