1. Unblocking a Pen
![](https://iv1.vnecdn.net/vnexpress/images/web/2017/03/31/nhung-meo-vat-huu-ich-o-truong-hoc-1490950294.jpg?w=0&h=0&q=100&dpr=1&fit=crop&s=zBpYBzrqYYIkAN3Vxs6YDQ)
Unblock your pen by holding the tip over a flame for a few seconds. This will melt any blockage and get the ink flowing again.
2. Using a Ruler as a Cheat Sheet
![](https://iv1.vnecdn.net/vnexpress/images/web/2017/03/31/nhung-meo-vat-huu-ich-o-truong-hoc-2-1490952087.jpg?w=0&h=0&q=100&dpr=1&fit=crop&s=IDfCBp0tsMVrSzjynlLESg)
If you’re struggling to memorize those tricky math or physics formulas, try writing them on your ruler! This way, you can quickly refer to them during class without having to flip through your notes.
3. Drawing a Perfect Circle
![](https://iv1.vnecdn.net/vnexpress/images/web/2017/03/31/nhung-meo-vat-huu-ich-o-truong-hoc-3-1490952657.jpg?w=0&h=0&q=100&dpr=1&fit=crop&s=KgO5qhRcBc70N24U-jYRLQ)
Create a perfect circle by using two ballpoint pens and a bit of pressure. Simply hold the pens together, with the tips forming a “V” shape, and rotate them in a circular motion.
4. Making a DIY Compass
![](https://iv1.vnecdn.net/vnexpress/images/web/2017/03/31/nhung-meo-vat-huu-ich-o-truong-hoc-5-1490953212.jpg?w=0&h=0&q=100&dpr=1&fit=crop&s=FU8qF-XRYaPZAyHG-I2azg)
Craft your own compass using everyday items! All you need is a pencil, a needle, and some thread. This way, you can accurately measure and draw circles of any size.
5. Creating a Bookmark
![](https://iv1.vnecdn.net/vnexpress/images/web/2017/03/31/nhung-meo-vat-huu-ich-o-truong-hoc-4-1490952753.jpg?w=0&h=0&q=100&dpr=1&fit=crop&s=DnccGJA1mnhindIxjEB1IA)
Instead of dog-earing your pages, create colorful bookmarks in just a minute! This will keep your books in pristine condition.
6. Enhancing an Eraser
![](https://iv1.vnecdn.net/vnexpress/images/web/2017/03/31/nhung-meo-vat-huu-ich-o-truong-hoc-6-1490953400.jpg?w=0&h=0&q=100&dpr=1&fit=crop&s=H_AG1ynEEFHxjw6LTvOpMA)
Maximize your eraser’s effectiveness by cutting it into a thin, rectangular shape. This increases the surface area, making it easier to erase larger sections at once.
7. Writing in Multiple Colors
![](https://iv1.vnecdn.net/vnexpress/images/web/2017/03/31/nhung-meo-vat-huu-ich-o-truong-hoc-10-1490955638.jpg?w=0&h=0&q=100&dpr=1&fit=crop&s=uiBGWcdiIITWP4I_W-bR9g)
Add some color to your notes! Simply hold multiple colored markers together and secure them with a rubber band. Now you can write or draw in multiple colors at once.
8. Mixing Colors in Your Pen
![](https://iv1.vnecdn.net/vnexpress/images/web/2017/03/31/nhung-meo-vat-huu-ich-o-truong-hoc-8-1490954139.jpg?w=0&h=0&q=100&dpr=1&fit=crop&s=egXXhCT0T2J_QYVn7IGdDg)
Create a rainbow effect with your pen! Similar to the previous hack, hold multiple colored markers together and secure them with a rubber band. Now, as you write, you’ll produce a beautiful spectrum of colors.
9. Fixing a Broken Zipper
![](https://iv1.vnecdn.net/vnexpress/images/web/2017/03/31/nhung-meo-vat-huu-ich-o-truong-hoc-7-1490953812.jpg?w=0&h=0&q=100&dpr=1&fit=crop&s=pUA_-PZyh_zNjEi7MEzOaw)
Don’t let a broken zipper slow you down! Simply attach a paper clip to the zipper head, and you’ll be able to zip and unzip with ease.
10. Deodorizing Your Sneakers
![](https://iv1.vnecdn.net/vnexpress/images/web/2017/03/31/nhung-meo-vat-huu-ich-o-truong-hoc-9-1490954877.jpg?w=0&h=0&q=100&dpr=1&fit=crop&s=oTXP_Dujbwd6zIN9e73lDw)
Keep your sneakers smelling fresh! Place dryer sheets or tea bags inside your shoes after a long day to absorb any unpleasant odors.
Phiêu Linh (Curated)