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One common problem that English as a Second Language (ESL) learners have is using the correct prepositions of time and place both orally and in written text. This instructional module focuses on three commonly misused prepositions: in , on , and at .


Students will learn the definition of prepositions. They will also learn how to apply the correct usage of the prepositions of time and place in , on , and at by following the rules of usage for each preposition.

The rules presented in this module for using the prepositions in , on , and at are the following:

Specific clock times, mealtimes
Specific addresses
General locations or points in space
Meeting places
Nonspecific times
Names of land areas
Enclosed spaces
Print media
Specific days or dates
Names of streets&avenues
General vicinities; electronic media

Teaching strategies

It is recommended that the instructor review all material prior to teaching this lesson. In the slide show, a brief definition of prepositions is provided. Students should learn the definition of a preposition: prepositions link nouns and pronouns to objects and always introduce prepositional phrases. Students should also have prior knowledge of what a prepositional phrase is.

The PowerPoint presentation provides the above-mentioned rules for using in , on , and at in sentences using time and place . Two interactive practice slides (# 4 and # 8) offer an in-class activity for the instructor to present. Each practice sentence is animated individually so that the instructor can ask students to select the correct answer within the options that are given. After students respond, with a mouse click, the correct answer is highlighted.


In order to offer this lesson, instructors need a computer and a multi-media projector.

The following materials are provided with this module:

  1. PowerPoint slide show
  2. A hand-out of the slide show for students after they receive the lesson
  3. A practice sheet with 20 exercises using in , on , and at
  4. The answer sheet for the practice exercises using in , on , and at


The authors recommend that the instructor distribute the practice sheet to the students as a pre-test prior to receiving the lesson. After completing the lesson, students should answer the practice sheet again as a post-test. In this way, instructors would determine whether the students master this objective or require additional instructional support.

Questions & Answers

what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Civis project - uprm. OpenStax CNX. Nov 20, 2013 Download for free at http://cnx.org/content/col11359/1.4
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