Hola Eliana! Yo vi que estas metas son de esculea primaria en Espana (lo siento por no incluyendo marcas ortograficas). Tengo experiencia en este tipo de lenguaje educativo, y te voy ayudar corregir los traducciones- por la mayor parte es un asunto de la orden de las palabras que discrepan en los dos lenguajes. Se trata una lista de competencias y no son hechos para ser frases completas- es verdad? En este caso, aqui esta mi intento: -To acquire in a foreign language at least the basic communicative competence which allows for the expression and understanding of simple messages and managing (or: 'getting along') in daily situations. -Adquirir en, al menos, una lengua extranjera la competencia comunicativa básica que les permita expresar y comprender mensajes sencillos y desenvolverse en situaciones cotidianas. -To begin using, for the purpose of language learning, information technology and communication to develop and apply critical thinking to the messages they receive and produce. -Iniciarse en la utilización, para el aprendizaje, de las Tecnologías de la Información y la Comunicación desarrollando un espíritu crítico ante los mensajes que reciben y elaboran. -To use different representations and artistic expressions and begin constructing visual and audiovisual suggestions. (este palabra 'suggestions' no cabe perfectamente- se trata algo como intentos- 'attempts' quizas mejor, o 'attempts at communication') -Utilizar diferentes representaciones y expresiones artísticas e iniciarse en la construcción de propuestas visuales y audiovisuales.

1) In all of your examples vacant, open, and free are synonyms. Vacant would be a more formal way to say it. As far as the checkout line, I would say open or free- again, vacant would be more formal. Otherwise your examples are good ones that a native speaker would use. 2) Antonyms for vacant/open ('of' is also correct and probably the most 'correct' word here, however in daily speech both are common) Occupied is correct and the formal antonym of vacant.A less formal option is 'full' or 'busy'. 3) Yes, these sentences work. To 'start someone off' on something is a fairly common way to talk about the beginning of a thing.

The correct formulation is, "The work is challenging for me." You can also say, "The work challenges me."

No, it doesn't mean anything. It may be an older name for some kind of animal, but we do not use it in USA today.

This is a phrase used to convey the future tense. Often phrases are cut short by the news media to keep their headline concise. The way this phrase would look in its complete form- 'Obama will visit Cuba'

In this case 'in' or 'on' would be correct. People often use 'on' for facebook posts and 'on' is used for the phrase 'online', so perhaps in this context 'on' would be better.

Please note that we are going to cancel the textbook ( Precalculus with Limits, 2nd Ed., Larson ) , that Ms. Sofi already ordered through Amazon. For the textbook, Calculus of a Single Variable, I am forwarding an email from DOO (?) last year which includes an excel file for the mathematics department including the price of that book. Would you please check with them to see if the price rose this year?