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  1. The Periodic Table
    by Dr. Osama M. Khaled — published Jun 06, 2024 — last modified Jul 13, 2024 12:57 PM — filed under: Year 9
    The periodic table sorts the elements by chemical properties and are listed horizontally in order by atomic number.
    Located in Physics / Atoms and Molecules
  2. Calculate commissions and commission rates
    by Dr. Osama M. Khaled — published Dec 13, 2024 — last modified May 12, 2025 06:14 AM — filed under: Year 7, Year 8, Year 9
    Instead of working for a salary or getting paid at an hourly rate,many salespeople are paid on commission.They earn a certain percent of the total dollar ...
    Located in Mathematics / … / Percent / Applications of Percent
  3. Basics
    by Dr. Osama M. Khaled — published Jun 26, 2022 — last modified Jul 13, 2024 10:31 PM — filed under: Year 9
    Test your basic knowledge in computers
    Located in Computing / Hardware / Introduction
  4. Definitions
    by Dr. Osama M. Khaled — published Jun 25, 2022 — last modified Jul 13, 2024 10:32 PM — filed under: Year 9
    A quiz in basic definitions of computer hardware
    Located in Computing / Hardware / Introduction
  5. History
    by Dr. Osama M. Khaled — published Jun 26, 2022 — last modified Jul 13, 2024 10:32 PM — filed under: Year 9
    Test your basic knowledge in history of computers
    Located in Computing / Hardware / Introduction
  6. History of Algebra
    by Dr. Osama M. Khaled — published Jun 04, 2022 — last modified Jul 23, 2025 03:32 AM — filed under: Year 9
    Algebra is one of the major branches of mathematics which was established by Muslim Arabs.
    Located in Mathematics / Algebra / Basics
  7. Quadratic Expressions - Expanding
    by Dr. Osama M. Khaled — published Nov 20, 2020 — last modified Jul 12, 2024 10:22 PM — filed under: Year 9
    Expanding quadratic expressions is very important. It should be very easy as well. Do not be scared. Take the quiz and try it yourself
    Located in Mathematics / Algebra
  8. Quadratic Expressions - Expanding
    by Mohamed Osama — published Dec 17, 2020 — last modified Jun 06, 2025 09:26 AM — filed under: Year 9
    Another quiz showing how to do equation expansion
    Located in Mathematics / Algebra
  9. Distributive Property
    by Dr. Osama M. Khaled — published May 28, 2023 — last modified Jul 12, 2024 10:06 PM — filed under: Year 8, Year 9
    Distributive property is often used to simplify algebraic expressions.
    Located in Mathematics / Algebra / Simplifying Algebraic Expressions
  10. Simplify products
    by Dr. Osama M. Khaled — published May 25, 2023 — last modified Jul 12, 2024 10:24 PM — filed under: Year 9
    The commutative and associative properties of multiplication can be used to simplify certain products
    Located in Mathematics / Algebra / Simplifying Algebraic Expressions
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