SCIENCEA-Z.COM Science A-Z - Elementary Science Resources

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sciencea-z.com website information.

sciencea-z.com domain name is registered by .COM top-level domain registry. See the other sites registred in .COM domain zone.

Following name servers are specified for sciencea-z.com domain:

  • ns2.voyagerlearning.com
  • ns3.voyagerlearning.com
  • ns4.voyagerlearning.com
  • ns1.voyagerlearning.com

and probably website sciencea-z.com is hosted by CHINA169-BJ China Unicom Beijing Province Network, CN web hosting company. Check the complete list of other most popular websites hosted by CHINA169-BJ China Unicom Beijing Province Network, CN hosting company.

According to Alexa traffic rank the highest website sciencea-z.com position was 16045 (in the world). The lowest Alexa rank position was 983881. Now website sciencea-z.com ranked in Alexa database as number 877711 (in the world).

Website sciencea-z.com Desktop speed measurement score (61/100) is better than the results of 37.05% of other sites shows that the page desktop performance can be improved.

sciencea-z.com Mobile usability score (75/100) is better than the results of 23.63% of other sites and shows that the page mobile usability is poor and can be improved.

Mobile speed measurement score of sciencea-z.com (45/100) is better than the results of 25.64% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

Weekly Rank Report

DateRankChange
Nov-12-2024 N/AN/A
Nov-11-2024 877,7110
Nov-10-2024 877,711-8,274
Nov-09-2024 869,43738,279
Nov-08-2024 907,716-14,824
Nov-07-2024 892,892-19,275
Nov-06-2024 873,61732,990

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sciencea-z.com Rank History

Alexa can identify the popularity of a website as well as its competitors. It is important for website owners and bloggers to know their Alexa ranking because it shows how many visitors have viewed their web page. It gives them a clear idea of how popular their website is on the internet and the ranking of their competitors.


sciencea-z.com whois

WHOIS is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block, or an autonomous system, but is also used for a wider range of other information.

Domain Name: SCIENCEA-Z.COM
Registry Domain ID: 92308355_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.networksolutions.com
Registrar URL: http://networksolutions.com
Updated Date: 2022-10-13T20:01:14Z
Creation Date: 2002-11-18T04:10:40Z
Registry Expiry Date: 2025-11-18T04:10:40Z
Registrar: Network Solutions, LLC
Registrar IANA ID: 2
Registrar Abuse Contact Email: domain.operations@web.com
Registrar Abuse Contact Phone: +1.8777228662
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: NS1.CAMBIUMLEARNING.COM
Name Server: NS2.CAMBIUMLEARNING.COM
DNSSEC: signedDelegation
DNSSEC DS Data: 45589 13 4 DF417BBFDF940F95D4DCE3C4C52FA3657F15CF80044CAA91AAA630FFF474058E92D89EB2708C4DF034BED12CBE68244A
DNSSEC DS Data: 45589 13 2 D209D6B847A59DFCC4871E424B089AEAF95E1D733DD647E3B6F12012357FB2B7
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2024-10-22T15:28:53Z

sciencea-z.com server information

Servers Location

IP Address
12.233.124.168
Country
United States
Region
New Jersey
City
Middletown

sciencea-z.com desktop page speed rank

Last tested: 2018-11-01

Desktop Speed Bad
61/100

sciencea-z.com Desktop Speed Test Quick Summary


priority - 21 Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 208.2KiB (75% reduction).

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priority - 12 Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

https://www.sciencea-z.com/shared/images/logos/logo-learninga-z.svg (expiration not specified)
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https://bat.bing.com/bat.js (30 minutes)
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priority - 12 Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 124 blocking script resources and 6 blocking CSS resources. This causes a delay in rendering your page.

None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.

Remove render-blocking JavaScript:

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Optimize CSS Delivery of the following:

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priority - 9 Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

Avoid landing page redirects for the following chain of redirected URLs.

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priority - 9 Optimize images

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Optimize the following images to reduce their size by 86.6KiB (32% reduction).

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priority - 4 Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 38.3KiB (24% reduction).

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sciencea-z.com Desktop Resources

Total Resources168
Number of Hosts5
Static Resources156
JavaScript Resources126
CSS Resources6

sciencea-z.com Desktop Resource Breakdown

sciencea-z.com mobile page speed rank

Last tested: 2018-11-01

Mobile Speed Bad
45/100

sciencea-z.com Mobile Speed Test Quick Summary


priority - 48 Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 124 blocking script resources and 6 blocking CSS resources. This causes a delay in rendering your page.

None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.

Remove render-blocking JavaScript:

https://www.sciencea-z.com/shared/js/jquery-1.9.1.…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/jquery-ui-1.1…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/underscore-1.…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular-1.6.0…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular-1.6.0…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular-1.6.0…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular-1.6.0…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular-1.6.0…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular-1.6.0…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/angul…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/share…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/la…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/la…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/core/…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/core/…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/core/…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/core/…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/util/…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/util/…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/util/…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/util/…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/util/…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/util/…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/util/…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/util/…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/util/…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/util/…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/util/…8_11_007-1541102691.js
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https://www.sciencea-z.com/shared/js/angular/ui/ap…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/jo…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/as…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/as…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/ht…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/jq…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/la…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/la…8_11_007-1541102691.js
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https://www.sciencea-z.com/shared/js/angular/ui/la…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/la…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/la…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/ma…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/me…8_11_007-1541102691.js
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https://www.sciencea-z.com/shared/js/angular/ui/na…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/or…8_11_007-1541102691.js
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https://www.sciencea-z.com/shared/js/angular/ui/po…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/po…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/ra…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/re…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/se…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/sl…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/so…8_11_007-1541102691.js
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https://www.sciencea-z.com/shared/js/angular/ui/st…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/to…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/to…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/to…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/tu…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/tu…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/tu…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/tu…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/tu…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/tu…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/tu…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/ui…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/ui…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/fe…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/he…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/sl…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/sl…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/sl…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/sl…8_11_007-1541102691.js
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https://www.sciencea-z.com/shared/js/angular/ui/sl…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/ui/sl…8_11_007-1541102691.js
https://www.sciencea-z.com/js/angular/saz.module--…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/popou…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/popou…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/popou…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/popou…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/popou…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/popou…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/popou…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/popou…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/angular/popou…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/prototype--clt_18_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/scriptaculous…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/scriptaculous/builder.js
https://www.sciencea-z.com/shared/js/scriptaculous/effects.js
https://www.sciencea-z.com/shared/js/scriptaculous/dragdrop.js
https://www.sciencea-z.com/shared/js/scriptaculous/controls.js
https://www.sciencea-z.com/shared/js/scriptaculous/slider.js
https://www.sciencea-z.com/shared/js/scriptaculous/sound.js
https://www.sciencea-z.com/shared/js/popoutcontrol…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/common--clt_18_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/commonUtils--…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/lightwindow--…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/bannercontrol…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/scroller--clt_18_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/popoutmenu--c…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/modernizr-2.8…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/jquery.accordion-1.2.2.source.js
https://www.sciencea-z.com/shared/css/layerslider/…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/css/layerslider/…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/css/layerslider/…8_11_007-1541102691.js
https://www.sciencea-z.com/js/science--clt_18_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/infiniteScrol…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/filterLoader-…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/kaz--clt_18_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/ModalKeyboard…8_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/ordernow--clt_18_11_007-1541102691.js
https://www.sciencea-z.com/shared/js/MenuBarKeyboa…8_11_007-1541102691.js

Optimize CSS Delivery of the following:

https://www.sciencea-z.com/shared/js/jquery-ui-1.1…_11_007-1541102691.css
https://www.sciencea-z.com/shared/css/layerslider/…_11_007-1541102691.css
https://www.sciencea-z.com/css/styles-eng--clt_18_11_007-1541102691.css
https://www.sciencea-z.com/shared/css-generated/st…_11_007-1541102691.css
https://www.sciencea-z.com/shared/css-generated/st…_11_007-1541102691.css
https://www.sciencea-z.com/css-generated/styles--c…_11_007-1541102691.css

priority - 34 Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

Avoid landing page redirects for the following chain of redirected URLs.

http://sciencea-z.com/
https://sciencea-z.com/
https://www.sciencea-z.com/

priority - 21 Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 208.2KiB (75% reduction).

Minifying https://www.sciencea-z.com/shared/css-generated/st…_11_007-1541102691.css could save 128.4KiB (78% reduction) after compression.
Minifying https://www.sciencea-z.com/shared/css-generated/st…_11_007-1541102691.css could save 69.2KiB (74% reduction) after compression.
Minifying https://www.sciencea-z.com/css-generated/styles--c…_11_007-1541102691.css could save 8.5KiB (76% reduction) after compression.
Minifying https://www.sciencea-z.com/shared/js/jquery-ui-1.1…_11_007-1541102691.css could save 1.4KiB (24% reduction) after compression.
Minifying https://www.sciencea-z.com/shared/css/layerslider/…_11_007-1541102691.css could save 745B (21% reduction) after compression.

priority - 18 Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

https://www.sciencea-z.com/shared/images/logos/logo-learninga-z.svg (expiration not specified)
https://www.sciencea-z.com/shared/images/logos/logo-sciencea-z.svg (expiration not specified)
https://bat.bing.com/bat.js (30 minutes)
https://ssl.google-analytics.com/ga.js (2 hours)
https://www.sciencea-z.com/images/home-slide01.png (12 hours)
https://www.sciencea-z.com/images/home-slide02.jpg (12 hours)
https://www.sciencea-z.com/images/home-slide03.jpg (12 hours)
https://www.sciencea-z.com/images/home-slide04.jpg (12 hours)
https://www.sciencea-z.com/images/sciencea-z-video.jpg (12 hours)
https://www.sciencea-z.com/shared/images/arrow-sample-tabs.png (12 hours)
https://www.sciencea-z.com/shared/images/bg-bundlebar-clouds.png (12 hours)
https://www.sciencea-z.com/shared/images/bg-home-tabber-shadow.jpg (12 hours)
https://www.sciencea-z.com/shared/images/bg-home-tabber.jpg (12 hours)
https://www.sciencea-z.com/shared/images/bullet2.png (12 hours)
https://www.sciencea-z.com/shared/images/button-tab-freesamples-166.png (12 hours)
https://www.sciencea-z.com/shared/images/button-tab-order-166.png (12 hours)
https://www.sciencea-z.com/shared/images/button-tab-trial-166.png (12 hours)
https://www.sciencea-z.com/shared/images/homebanner-bg.jpg (12 hours)
https://www.sciencea-z.com/shared/images/loginBannerBg.png (12 hours)
https://www.sciencea-z.com/shared/images/loginBannerBtnSprite.png (12 hours)
https://www.sciencea-z.com/shared/images/loginBannerRobot.png (12 hours)
https://www.sciencea-z.com/shared/images/logos/logo-learninga-z-gray.png (12 hours)
https://www.sciencea-z.com/shared/images/social-facebook.png (12 hours)
https://www.sciencea-z.com/shared/images/social-twitter.png (12 hours)
https://www.sciencea-z.com/shared/images/social-youtube.png (12 hours)
https://www.sciencea-z.com/shared/img/lightwindow/black.png (12 hours)

priority - 9 Optimize images

Properly formatting and compressing images can save many bytes of data.

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priority - 4 Minify JavaScript

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sciencea-z.com Mobile Resources

Total Resources168
Number of Hosts5
Static Resources156
JavaScript Resources126
CSS Resources6

sciencea-z.com Mobile Resource Breakdown

sciencea-z.com mobile page usability

Last tested: 2018-11-01

Mobile Usability Medium
75/100

sciencea-z.com Mobile Usability Test Quick Summary


priority - 19 Use legible font sizes

The following text on your page renders in a way that may be difficult for some of your visitors to read. Use legible font sizes to provide a better user experience.

The following text fragments have a small font size. Increase the font size to make them more legible.

Member Login renders only 5 pixels tall (14 CSS pixels).

Order Now renders only 5 pixels tall (14 CSS pixels).

Free Trial and 1 others render only 5 pixels tall (14 CSS pixels).

ABOUT SCIENCE A-Z renders only 6 pixels tall (15 CSS pixels).

RESOURCES renders only 6 pixels tall (16 CSS pixels).

TEACHER CORNER and 1 others render only 5 pixels tall (14 CSS pixels).

Science A-Z en…teracy skills. renders only 7 pixels tall (17 CSS pixels).

Thousands of r…and practices and 2 others render only 6 pixels tall (15 CSS pixels).

Get More Info renders only 5 pixels tall (13 CSS pixels).

Start Free Trial renders only 5 pixels tall (13 CSS pixels).

Order Now renders only 5 pixels tall (13 CSS pixels).

Overview renders only 7 pixels tall (18 CSS pixels).

Comprehensive Instruction renders only 7 pixels tall (18 CSS pixels).

Science and Literacy renders only 7 pixels tall (18 CSS pixels).

Activities and Experiments renders only 7 pixels tall (18 CSS pixels).

Science A-Z is…opportunities. renders only 5 pixels tall (13 CSS pixels).

Expand students' understanding and 2 others render only 5 pixels tall (13 CSS pixels).

with high-inte…investigation. and 3 others render only 5 pixels tall (13 CSS pixels).

(K-2, 3-4, and 5-6) renders only 5 pixels tall (13 CSS pixels).

Free Samples renders only 5 pixels tall (13 CSS pixels).

Free Trial renders only 5 pixels tall (13 CSS pixels).

Order Now renders only 5 pixels tall (13 CSS pixels).

Subscribe renders only 7 pixels tall (17 CSS pixels).

at any time. and 1 others render only 6 pixels tall (15 CSS pixels).

unsubscribe renders only 6 pixels tall (15 CSS pixels).

PROFESSIONAL DEVELOPMENT and 4 others render only 6 pixels tall (16 CSS pixels).

© 2018 LAZEL,…third parties. renders only 5 pixels tall (12 CSS pixels).

priority - 10 Configure the viewport

Your page does not have a viewport specified. This causes mobile devices to render your page as it would appear on a desktop browser, scaling it down to fit on a mobile screen. Configure a viewport to allow your page to render properly on all devices.

Configure a viewport for this page.

priority - 3 Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

The tap target <a href="/main/ViewPage…duct-overview/">About Science A-Z</a> is close to 1 other tap targets.

The tap target <a href="/main/ViewPage…/teachercorner" class="js-navMenuLink">Teacher Corner</a> is close to 1 other tap targets.

The tap target <li id="tab1-link" class="selected">Overview</li> is close to 2 other tap targets.

The tap target <h2>Differentiated…r K-6 Students</h2> is close to 2 other tap targets.

The tap target <p>Science A-Z is…opportunities.</p> is close to 3 other tap targets.

The tap target <li>Differentiate…3-4, and 5-6).</li> and 2 others are close to other tap targets.

The tap target <strong>Differentiate instruction</strong> and 2 others are close to other tap targets.

The tap target <span>(K-2, 3-4, and 5-6)</span> is close to 3 other tap targets.

The tap target <a href="/main/ViewPage…oduct-overview" class="btn btn-sm">Learn More</a> is close to 3 other tap targets.

The tap target <span class="arrowRight"> is close to 3 other tap targets.

The tap target <a href="http://help.learninga-z.com/" class="footer-link">Help</a> is close to 2 other tap targets.

The tap target <a href="http://www.fac…9760237?ref=ts"></a> and 2 others are close to other tap targets.

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sciencea-z.com Ping

Ping is a networking utility tool to test if a particular host is reachable. It is a diagnostic that checks reachability of a host on an Internet Protocol (IP) network. In a computer network, a ping test is a way of sending messages from one host to another. Aside from checking if the host is connected to a network, ping also gives indicators of the reliability and general speed of the connection.

sciencea-z.com TRACEROUTE

Traceroute is a network diagnostic tool used to track the pathway taken by a packet on an IP network from source to destination. Traceroute also records the time taken for each hop the packet makes during its route to the destination. Traceroute uses ICMP (Internet Control Message Protocol) echo packets with variable time to live values. The response time of each hop is calculated. To guarantee accuracy, each hop is queried multiple times (usually three times) to better measure the response of that particular hop.