This site is based on the principles of web design principles, the site's main content is divided into four blocks：
1. Upper function block,
2. Left navigation block,
3. Central content block,
4. Right related link block.
The quickkey [Accesskey] of this website is set as follows:
•Alt+U：Top functional blocks, including profiles, privacy policy, site navigation, FAQs, comments mailbox, home page, and so on.
•Alt+L：The left navigation block is the main menu area for this site.
•Alt+C：Central content block, the main content area on this page.
•Alt+R：The right associated link block, for the promotional video, the relevant link area, winning lesson plans.
•Alt+S：Sebsite search.
※ When the project item tab can not click on the mouse, you can use the following keyboard operation to browse the data
•← → or ↑↓：Press the up or down key or the up and down keys to move the label order.
•Home or End→：You can jump directly to the first or last item of the label.
•Tab：stay in the label, you can use the Tab key to jump to the content to browse the information, encounter the radio button with the ← → or ↑ ↓ key to move the project order.
•Tab + Shift：Press Tab + Shift to jump back to the previous item; you can continue to use the ← → or ↑ ↓ keys to move the tag sequence when you jump back to the label item.
