Memorizing the introduction, key points, and conclusion word-for-word is wise. However, unless your teacher requires it, don't feel like you have to memorize the entire speech verbatim. Reciting a completely memorized speech can feel stiff, so just commit the content to memory well enough that you can explain your ideas clearly and consistently. While it's generally okay to use slightly different phrasing, try to stick to your complete outline as best you can. If you veer off too much or insert too many additional words, you could end up exceeding your time limit. Keep in mind your speaking outline will help you stay focused. As for quotes and statistics, feel free to write them on your notecards for quick reference. Use hand gestures to emphasize key words and ideas, and make natural eye contact to engage the audience. Be sure to switch your gaze every 5 or 10 seconds instead of staring blankly in a single direction. Instead of slouching, stand up tall with your shoulders back. In addition to projecting confidence, good posture will help you breathe deeply to support your voice. Once you've committed the speech to memory, work on making your delivery as engaging as possible. Watch yourself in a mirror or record yourself to make sure you appear confident and natural. Get a second opinion and ask a friend or relative to watch you and offer feedback. Have them point out any spots that dragged or seemed disorganized. Ask if your tone was engaging, if you used body language effectively, and if your volume, pitch, and pacing need any tweaks. Use a stopwatch or cell phone app to time yourself when you practice your speech. Speak clearly and avoid rushing, but work on keeping your speech under the time limit, if your instructor set one. If you keep exceeding the time limit, review your complete sentence outline. Cut any fluff and simplify complicated phrases. If your speech isn't long enough, look for areas that could use more detail or consider adding another section to the body. Just make sure any content you add is relevant. For instance, if your speech on nationalism and World War I is 2 minutes too short, you could add a section about how nationalism manifested in specific countries, including Britain, Germany, Austria-Hungary, and Serbia.
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One-sentence summary -- Write the main points and helpful cues on notecards. Project confidence with eye contact, gestures, and good posture. Practice the speech in a mirror or to a friend. Make sure you stay within the time limit.

Article: Use a tape measure to measure the width and length of the indoor space you want to cool. Then multiply the width by the length. Different air conditioners have different cooling capacities, so you'll need this information to select one that has the correct cooling capacity for the size of the space you want to cool. If there's no wall or door separating the space you want to cool from an adjoining room, add the area of the adjoining room to your calculation because the air conditioner will have to cool that space as well. The cooling capacities of all air conditioners are measured in BTUs (British thermal units) per hour. By looking at a unit's BTUs, you can know the area it is capable of adequately cooling. The higher a unit's BTU, the larger the area it can cool. The label or online description of a specific air conditioner will typically state what area the unit is capable of cooling. An air conditioner with a cooling capacity of 5,000 BTUs, for example, can cool rooms that are between 100150 square feet (9.313.9m2) in area. You'll need an air conditioner with a cooling capacity of 6,000 BTUs to cool a room that's 150250 square feet (1423m2) in area. For a comprehensive guide to what BTU rating most closely matches the size of your room, visit https://www.energystar.gov/products/heating_cooling/air_conditioning_room?qt-consumers_product_tab=3#qt-consumers_product_tab. Aside from the size of the space you want to cool, the amount of sunlight it receives and other factors will also determine the BTU rating you'll want to choose. Go with a unit with 10 percent higher capacity if your room receives a lot of direct sunlight. Buy a unit with 10 percent less capacity if the room you'll be cooling is heavily shaded. Add another 4,000 BTU if you'll be using the air conditioner to cool your kitchen. If more than 2 people will be regularly spending time in the room, increase the capacity of the air conditioner you buy by 600 BTUs per person.
Question: What is a summary of what this article is about?
Measure the area you need the air conditioner to cool. Find an A/C unit with the recommended BTU rating for your space. Get an A/C unit with a higher BTU rating if your space receives a lot of sunlight.