Good Calculators has over 150 free online calculators, grouped into 24 categories, for easy selection. These are useful in school settings, business, and for math in daily life. Insight into how calculations are derived is provided, where possible.
Math Homework Help Reader ReviewsThe following site reviews were submitted by readers like you. Discovered (or created) a cool site we should know about? Click here to add URL.
March 3, 2016 -- Submitted by Jesus, a reader from Madrid (Spain), who is affiliated with the site.
http://TrianCal.esy.es – Open in Google Chrome.
(Triangles online calculator developed by Jesus S.)
This free online calculates triangles, without advertising, is designed to help students with geometry. Their calculations formulas are not displayed. It is designed in a didactic way to check and view the
TrianCal is online calculator triangles that works with any combination of values including sides, heights, angles, the area or perimeter of any triangle, calculating it with the minimum possible value (typically three).
– Draw the triangle (s) with GeoGebra.
– Set the range of values allowed into each element.
– The type of angle.
– The type of triangle by its sides and angles.
– Selection of language (English or Spanish).
– Select and angles [degrees (°), Radians, Degrees, minutes and seconds (°
‘”) or degrees and minutes (°’)] is.
– Number of decimal places to show in the results (0-15).
– You can use the arrow keys and the Tab key to navigate through the
– Drop-down menu to select values comfortably.
– Create a link (URL) to the current triangle.
– An icon mail to communicate with the author.
NOTE: You must use the Google Chrome browser to display correctly TrianCal.
Examples of possible combinations:
– The area, perimeter and other data (side, height or angle), if the outside
equilateral triangle would not need the third data.
– 2 angles and other data (if the value of the other data is not put aside
the value of “a” at the time of drawing the triangle is 10).
– One hand, one high and one angle.
– 3 heights.
– 3 sides.
– 2 heights and perimeter.
– Any other combination of values.
Great Kids Activities
February 1, 2016 -- Submitted by Katy, a reader from Kansas, who is affiliated with the site.
This is a website with many free activities for kids. These include educational activities- math, reading and preschool – and non-educational activities – cooking with kids, hiking with kids, slumber party ideas, indoor games, camp skits, campfire cooking and much more!
July 29, 2014 -- Submitted by Phoebe, a reader from CA, who is affiliated with the site.
K5 Learning is an online after-school study program for kids in kindergarten to grade 5. We build reading, math and study skills to last a lifetime.
February 11, 2013 -- Submitted by Ted, a reader from Silver Spring, MD, who is affiliated with the site.
This free site offers a wide selection of math lessons, along with other resources like calculators, solvers, games, worksheets, and a very active math help forum.
A+Click Math Test for K1-K12
July 16, 2012 -- Submitted by Igor Kokcharov, a reader from Switzerland, who is affiliated with the site.
A+ Click is a not-for-profit project that features a collection of illustrated challenging math problems for students in grades one through twelve. The website has a graduated set of over 2000 problems, starting from the very simple to the extremely difficult. The tests also include hundreds of practical problems and brainteasers.
July 9, 2012 -- Submitted by Jim, a parent from Canada, who is not affiliated with the site.
Here is a really nice site that me and my 8 year old son use. I like it because of its fast loading and range of different topics. There are no ads at all which will let my son be able to browse the site without problems or confusion. A friend shared this site with me and I thought it was great. According to the site, it is currently expanding and is still a little new, so I am looking for more updates soon. It is unrated and not many people have heard of it, so I thought I would share it with you.