Lawrence Hall of Science
The Math Page: An Approach to Calculus: Continuous Versus Discrete
Here is a site that clearly and thoroughly explains the the notion that calculus is the study of continuity. This page is mostly discussion of the difference between a continuous quantity and a discrete quantity. Point this site out to...
Other
Isabel's Esl Site: Past Continuous Tense
The past continuous is introduced by a little story which demonstrates its use. Examples and exercises follow. Some guidance in Spanish.
Grammarly
Grammarly Blog: Verb Tenses: Grammar Rules
This page explains the three major verb tenses: past, present, and future with examples. It also offers links to information about each of these as well as the perfect, continuous, and perfect continuous of each.
Other
Tidewater Community College: Writing Center: Verb Tenses
Writing center guide to verb tenses that dicusses present, present continuous, past, past continuous, future, future continuous, present perfect, and past perfect.
PBS
Pbs News Hour: Afghan War Takes Toll of Civilians
Read and learn about the toll that the war in Afghanistan has taken on the civilian population. (21 August 2009)
Shmoop University
Shmoop: Adding and Subtracting Limits Examples
Examples of addition and subtraction with limits including solutions to the example problems.
Khan Academy
Khan Academy: Progressive Verb Aspect
When something is ongoing, we say that it's in the 'progressive' or 'continuous' aspect. Test your knowledge of this grammatical aspect!
Math Medics
S.o.s. Math: Limits and Infinity
Graphs a limit with vertical asymtopes and shows the limits when x approaches 0 and 0 from left and right. Contains many examples.
CK-12 Foundation
Ck 12: Fourth Grade Science: Earth Science: Relative Ages of Rocks
[Free Registration/Login may be required to access all resource tools.] Looks at how stratigraphy can be used to determine the relative ages of rocks, how unconformities occur, ways to match rock layers in different areas, and how...
Mocomi & Anibrain Digital Technologies
Mocomi: Future Tense and Its Types
Learn about future tense and its types.