Amazing Resonance Experiment!
AdultsCreativityPhysicsExperimentsScienceEducation So this experiment is the Chladni plate experiment. I used a tone generator, a wave driver (speaker) and a metal plate attached to the speaker. First add sand to the plate then begin playing a tone. Certain frequencies vibrate the metal plate in such a way that it creates areas where there is no vibration. The sand "falls" into those areas, creating beautiful geometric patterns. As the frequency increases in pitch the patterns become more complex.
Future Aspects (Part 2)
AdultsGrammarSmrt LiveEducationLanguage Learn two ways to use be going to and how to use the present continuous to talk about the future. This lesson is for students at a pre-intermediate level.
The Second Conditional (Part 1)
AdultsGrammarSmrt LiveEducationLanguage Learn how English speakers make second conditional sentences, including the use of if and would. This lesson is for pre-intermediate students.
How to Make Passive Sentences in English
AdultsGrammarSmrt LiveEducationLanguage Learn how to use be with a past participle to make English sentences in the passive voice. This lesson is for students at a pre-intermediate level.
The Differences between the First and Second Conditionals
AdultsGrammarSmrt LiveEducationLanguage Learn how English speakers choose between the first and second conditionals. This lesson is for pre-intermediate students.
The Meaning of the Present Perfect Simple
AdultsGrammarSmrt LiveEducationLanguage Learn the main general meaning of the present perfect simple as well as how English speakers use it to describe duration. This lesson is for students at a pre-intermediate level.
I Will Not Let An Exam Result Decide My Fate
AdultsEducationMusicSelfSociety "I Will Not Let An Exam Result Decide My Fate" picks up on the education topic but takes a different stance and angle from "Why I Hate School But Love Education".
The Meaning and Use of Mustn't
AdultsGrammarSmrt LiveEducationLanguage Learn how English speakers use mustn't to express negative obligations. This lesson is for students at a pre-intermediate level.
Wringing a wet washcloth in space
AdultsScienceSpaceEducation International Space Station commander Chris Hadfield soaks a washcloth, gives it a twist, and...well, you'll see.
How to Use the Present Perfect to Explain Now
AdultsGrammarSmrt LiveEducationLanguage Learn how English speakers use the present perfect simple to explain the present with finished, past actions. This lesson is for students at a pre-intermediate level.
The Form of the Present Perfect Simple
AdultsGrammarSmrt LiveEducation Learn how to make the present perfect simple, including the helping verb have, and past participle. This video is for students at a pre-intermediate level.
Review of Must, Have To, and Should
AdultsGrammarSmrt LiveEducationLanguage Review what you have studied about using must, have to, and should. This video is for students at a pre-intermediate level.