**Forenote to posters: **It would be much appriciated if you would not post on this thread. This will help to keep the thread nice and organized. If you would like something to be added to this thread please message me and I'll be happy to add it!

Hello! You have reached the “Information Pages Worth Keeping or Developing” page. This page is a list posts that have explained things well and are good to look back at for future posts. This page is also meant for different pages on the website that are “worth developing” or can be elaborated on.

I redid this to try to make it easier to access/refer back to. Here is the original post by Melody: http://web2.0calc.com/questions/information-pages-worth-keeping-or-developing

This page is broken down into different sections as to try to make it easier to refer back to. For the most part, the topics are organized by “grade levels” of mathematics (like Algebra, Trigonometry, Calculus, etc.)

Remember, good manners are always important and very much appreciated!

http://web2.0calc.com/questions/good-manners-are-always-important_2

Without further a due, let’s dive right in!

**Various calculators and math resources:**

Calculator for linear regression (suggested by Alan)

http://www.alcula.com/calculators/statistics/linear-regression

Make a graph! (recommended by Melody and CPhill)

https://www.desmos.com/calculator

Reinout discovered how to use the web2 calc for different thinga in physics like electron mass/atomic mass. Read about it here:

http://web2.0calc.com/questions/new-calculator-option

Reinout_g says he likes this site for their variety of explanations of various topics, (everything from percentages to pythagoras’ theorem!) and for the fact that you don’t usually need any pre-requiring knowledge. He also likes how they have clear explanations that are never “dry.” Melody also recommends this page, and I have to agree with them, this is a nice math resource.

Conversion web page:

http://www.convert-me.com/en/convert/volume/

**Basic math concepts:**

The good ol' times tables:

Postive and negative numbers:

http://web2.0calc.com/questions/positive-and-negative-numbers-directed-numbers

Addition and subtraction of direct numbers:

http://web2.0calc.com/questions/it-just-doesn-t-make-sense-to-me

Fractions:

http://web2.0calc.com/questions/how-do-i-type-in-fractions

Fun with factorials! (A YouTube video Melody found)

http://www.youtube.com/watch?v=XwWyTts06tU

Estimating square roots

http://web2.0calc.com/questions/hi-i-want-to-know-how-to-solve-somthing-like-nbsp

Square root in answer verses introduced square root.

http://web2.0calc.com/questions/answer-of-square-root-4-must-be-plus-minus-2

OEIS (On-line encyclopedia of Integer sequences) Can’t find a pattern between a few numbers? Try out this website!

** **

**Algebra:**

Quadratic equation links:

http://web2.0calc.com/questions/grouping-method-and-factorizing-quadratic-equations

http://web2.0calc.com/questions/factorising-any-quadratic-formula-some-thoughts

**http://web2.0calc.com/questions/quadratic-formula-do-you-have-trouble-remembering-it**

Solving a more difficult algebra problem:

http://web2.0calc.com/questions/solve-for-x-x-6-5-x

A page explaining how to solve inequalities:

http://www.mathsisfun.com/algebra/inequality-solving.html

Youtube clip explaining how to factor trinomials using the grouping method:

https://www.youtube.com/watch?v=HvBiJ9W00Z4

Graphing log functions on the web2 calculator:

http://web2.0calc.com/questions/how-do-you-insert-log-into-the-graph-on-this-websiten

Negative indices and negative exponets (a great explanation by Melody)

http://web2.0calc.com/questions/indices-especially-negative-indices

**Geometry:**

Understanding conics, focus, directric, etc, with interactive graphing:

http://www.intmath.com/plane-analytic-geometry/4-parabola.php

Surface area of a cylinder:

http://web2.0calc.com/questions/what-is-the-surface-are-of-a-cylinder-with-r-8-h-4

A YouTube clip that shows measuring volume using displacement:

https://www.youtube.com/watch?v=n3ia4i-uFTM

Some discussions/explainations of pi: (Mmmm, pie……)

http://web2.0calc.com/questions/what-is-the-value-of-pi

http://web2.0calc.com/questions/why-does-pi-and-3-14-have-different-answers

** **

**Probability and statistics:**

**Trigonometry:**

Inverse trig on the web2 calculator:

http://web2.0calc.com/questions/how-can-i-put-tan-minus-in-the-calculator

Graphing complicated trig functions:

http://web2.0calc.com/questions/graphing-trig-functions_1#rr2

**Calculus:**

Introductory calculus:

** **

**Misc:**

What time is it around the globe?

http://web2.0calc.com/questions/world-time-map

Copy and paste web addresses.

http://web2.0calc.com/questions/how-to-copy-and-paste-web-addresses

**Website tips/tricks:**

http://web2.0calc.com/questions/found-something-that-makes-life-a-lot-easier

How do I upload an image?

http://web2.0calc.com/questions/how-to-upload-an-image-nbsp_1

Searching with keywords:

http://web2.0calc.com/questions/how-to-search-use-keywords-to-find-what-you-want

LaTex (a format that can be used when answering questions on this forum) This can be confusing when you first look at it. Here’s some posts on how to use LaTex:

**http://web2.0calc.com/questions/test_6**

http://web2.0calc.com/questions/latex

Some theories on why math is so hard:

NinjaDevo Jun 15, 2014

#1**0 **

I almost forogt, Melody sugested that each topic be a "reply" to the original post, I will probably do this on the final draft

NinjaDevo Jun 15, 2014

#2**0 **

Thanks NinjaDevo,

This looks great.

I've decided that this needs to go into the Sticky Notes (to replace the other one)

If it is not there no-one will use it and that defeats the whole purpose.

I will comment on it as I use it.

Please, NinjaDevo and I want your feed back.

Please use this information thread and add any relevant comments.

People are welcome to add their own reference / comment page BUT

Please just use one post as your own and edit it when needed.

Melody Jun 15, 2014