### Basic Math Lessons and Lesson Plans in PowerPoint

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 UNIT I Scientific Notation, Exponents and Square Roots: A conceptual approach Exponents, Square Root and Scientific Notation: Have you figured out how is it that we talk of the cube of a number? The square of a number? The root of a number? We know that the calculator has a keyboard for each one of them? But what is the exact meaning? You will see that the lesson develops the concept behind the power of a number. It starts by presenting the square and cube geometric meanings and their roots. Students learn to figure out in between what whole numbers is a given root. The activity is extended to learn about powers of 10, and finalizes with scientific notation.

 UNIT IV PERCENTS: A conceptual approach Percent of a Number: If you had difficulties figuring out what a percent is in relation to its fractional representation. You will get help in studying this presentation that uses a graphic representation of the concept. This lesson presents the procedure to get the percent of a number using a grid of 10x10 and linking it to the fractional and decimal representations for the area that is shaded and this is extended to get the percent of a  number. Comparing Numbers as a Percent: Have used the zoom feature of the camara in your cell phone? If you have your sister full figure in the eye of the camara. You have her "using 100%" of the usable viewable area for her figure. Now, if you zoom "in" now her face ocupies the 100% of the useful viewable area. If you zoom "out" depending of how much your camara may allow it. She might become a small spot somewhere in the screen. If you consider that the screen has pixels (small squares making up the figures), and the amount of pixels in the area of you screen is a fixed amount; then you may realize that when you zoom "in" or "out" you are playing with the number of pixels in that screen that are used for her full viewable figure or part of her figure. Sounds complex? In this lesson students are able to go from comparing two numbers to getting the percent of a given number of objects in a set. Calculate the Percent of Increase or Decrease of a Quantity: Have you gone with mom or dad to the cloths section in a departmental store and see that the price changed by some amount of dollars from the day before? Can you determine the percent it went down? If you go to the store across street and you see the same shirt a few dollars above. Could you tell the percent it is higher than the one in the first store? This lesson shows students how to understand a percent of increase and decrease as a change in area, from one initial one to final one. This is extended to word problems that involve this same concept. Finding the Amount of a Discount or a Commission: Now that you had the opportunity to go over fractions, decimals, and percents it is time to see some application problems. This lesson has been targeted to be expanded in the near future. Meanwhile, in the few problems you will apply everything learned about fractions, decimals and percents to figure out discounts and commissions in sale prices. Calculating Simple Interest: As explained above this lesson presents three word problems that involve getting the simple interest of one amount which is an effort to apply the concepts learned in the previous lessons. The lesson is a short one, but will benefit to try to work the few presented problems. Hopefully, we will find the time to add more problems.