Colby College
Spanish Language & Culture: Subjunctive Adverb Clauses (Part 2)
Students practice using the present subjunctive, the present indicative, or the infinitive after certain conjunctions. This exercise helps fortify the use of the subjunctive in adverbial clauses. Answers may be checked and corrected.
Colby College
Spanish Language & Culture: Preterite and Imperfect Tense
Great exercise for practicing the preterite and imperfect tenses. Choose the correct form of a verb to complete sentences that tell the story of Superman. Immediate feedback corrects the answer and gives the reason for its application in...
Other
French teacher.net: Resources and Lessons
This site maintained by a teacher in North Yorkshire, England, is a veritable treasure trove of resources for French teachers for grades K-12. Includes grammar handouts, lesson plans, and even Power Point presentations to download, and...
Howard Hughes Medical Institute
Hhmi: Biointeractive: Virtual Immunology Lab
This virtual laboratory demonstrates how an enzyme-linked immunosorbent assay (ELISA) is carried out and some of the key experimental problems that may be encountered. Students will learn about the assay procedure and the equipment and...
The College of Physicians
The History of Vaccines: Types of Vaccines
A three-part animation that explains the three types of vaccines - live attenuated vaccine, inactivated vaccine, and subunit vaccine.
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Conic Sections
Hotmath provides 26 practice problems relating to conic sections. Each of the practice problems include a step-by-step guide for solving their conic.
Chemistry Collective
Chem Collective: P H and Buffers Defined
This tutorial presents a review of the definitions for pH and buffer solutions
Chemistry Collective
Chem Collective: How Buffers Work
This tutorial describes how buffers protect against pH changes when strong acid or base is added.
Paul Dawkins
Paul's Online Notes: Algebra: Preliminaries: Complex Numbers
This math tutorial features notes and examples that illustrate complex numbers including standard form, adding, subtracting, multiplying and dividing them.
Purple Math
Purplemath: Conics: Hyperbolas
A three-part tutorial that discusses the basic terms, definitions, and formulas related to hyperbolas.
Chiral Publishing
Chiral Publishing: An Introduction to Chemistry: Bronsted Lowry Acids and Bases: Audio Book
Listen and learn as you discover definitions for acid, base, and acid-base reaction. View example formulas of Arrhenius and Bronsted-Lowry acid and bases.
Purple Math
Purplemath: Complex Numbers: Introduction
This website provides an in-depth lesson on complex numbers. You learn about simplifying, adding, and multiplying complex numbers by viewing example problems that are worked through step-by-step. Continue on to pages 2 and 3 which...
Study Languages
Study Spanish: Regular Verbs Part I
This introduction to conjugating verbs is the first in a series of three lessons,that focus on regular verbs in the present tense. This lesson teaches conjugations that correspond to the pronouns "yo", "nosotros", "usted", and "ustedes"....
Trent University
Mas Arriba: El Subjuntivo (Clausulas Adverbiales)
Through this exercise, students practice writing short phrases in Spanish and conjugating verbs in the subjunctive form as they are used in adverbial clauses. Audio is available as a guide and pop-up answers to check for verification.
Trent University
Mas Arriba: El Preterito (Los Verbos Irregulares 2)
Through this exercise, students practice conjugating a variety of irregular verbs in the preterite tense. Read the sentences, view the picture and type in your response. To check your answer just click on the drop down arrow next to...
Other
Learning Alive: Papel De Mujeres De Hoy en Matrimonio
Practice conjugating verbs in this article on the role of women in modern marriage. Fill in the blank with the correct form of the verb in the designated tense: present, present subjunctive, future, preterite, imperfect, or a gerund....
Other
Learning Alive: Violencia Domestica
Practice conjugating verbs with this article on domestic violence. Fill in the blank with the correct form of the verb in the designated tense: imperfect subjunctive, preterite, or imperfect. Answers may be checked at the end of the...
Languages Online
Languages Online: La Conduccion De Caravanas
Conjugate each verb in the "usted" command form in this article to offer advice on driving in caravans. Answers may be checked at the end of the exercise. Tutorials in other langauges available from the homepage.
Languages Online
Languages Online: La Conduccion en Autopista Y Carretera
Conjugate verbs in the "usted" command form to complete sentences that offer advice on freeway and highway driving. Practice the imperative tense and learn driving vocabulary at the same time. Answers may be checked at the end of the...
Languages Online
Languages Online: 19 Catalanes Mueren en Un Accidente
Practice conjugating verbs in the preterite or imperfect tense in the context of this news article. The article reports a bus accident in which 19 Catalans died in Spain. After filling in the blanks with the correct forms of the verbs,...
Languages Online
Languages Online: Estar With Idioms and Expressions
Great practice with idioms that use the verb "estar". Also provides practice conjugating the verb in present, preterite, imperfect, future, and conditional tenses--a different practice test for each tense. Answers may be verified after...
State University of New York
State University of New York: Common Ion Effect in Acid Base Systems
This simulation uses solutions of weak acids and examines the response of this equilibrium system to the addition of the corresponding conjugate base.
Colby College
Spanish Language & Culture: Subjunctive Verbs of Doubt
A Spanish word bank of verbs of doubt is used to complete Spanish translations of the main clause. The student practices conjugating these verbs in the present indicative tense. Answers may be checked and corrected. The present...
Digital Dialects
Digital Dialects: To Be and to Have in the Spanish Language
Learn to conjugate the verbs "to be" and "to have" in Spanish.