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  1. Mathematical Operations and Foundational Constraints
    by Dr. Osama M. Khaled — published May 23, 2026 — last modified May 23, 2026 08:55 AM — filed under: Year 7, Year 8
    Negative Numbers and Division by Zero
    Located in Mathematics / Calculus / From Arithmetic to Algebra
  2. Movement through the Cell Membrane
    by Dr. Osama M. Khaled — published Nov 07, 2022 — last modified Aug 02, 2024 10:59 PM — filed under: Year 8
    In addition to providing protection, shape, and strength to the cell, the membrane helps regulate the flow of materials in and out of the cell
    Located in Biology / Cell Structure
  3. Multiply two integers that have different signs
    by Dr. Osama M. Khaled — published Apr 29, 2026 — last modified Apr 29, 2026 08:57 PM — filed under: Year 8
    To multiply a positive integer and a negative integer,multiply their absolute values.Then make the final answer negative.
    Located in Mathematics / … / Integers / Multiplying Integers
  4. Multiply two integers that have the same sign
    by Dr. Osama M. Khaled — published Apr 30, 2026 — last modified Apr 30, 2026 09:09 PM — filed under: Year 8
    To multiply two integers that have the same sign,multiply their absolute values.The final answer is positive.
    Located in Mathematics / … / Integers / Multiplying Integers
  5. Order of Operations and Estimation (vocabulary)
    by Dr. Osama M. Khaled — published May 08, 2026 — last modified May 09, 2026 04:26 AM — filed under: Year 8
    Learn important vocabulary for order of operations and estimation for integers
    Located in Mathematics / … / Integers / Order of Operations and Estimation
  6. Perform several multiplications to evaluate expressions
    by Dr. Osama M. Khaled — published May 02, 2026 — last modified May 05, 2026 08:05 AM — filed under: Year 8
    To evaluate expressions that contain several multiplications,we make repeated use of the rules for multiplying two integers.
    Located in Mathematics / … / Integers / Multiplying Integers
  7. Pressure
    by Dr. Osama M. Khaled — published Sep 09, 2024 — last modified Sep 09, 2024 08:38 PM — filed under: Year 8, Year 11, Year 12
    Pressure is the force divided by the area over which the force is applied
    Located in Physics / Solids
  8. Pressure in a liquid
    by Dr. Osama M. Khaled — published Jul 16, 2025 — last modified Jul 19, 2025 10:28 PM — filed under: Year 7, Year 8
    Pressure in a liquid increases with depth below the surface
    Located in Physics / Liquids and Gases
  9. Properties and Theory of Integers
    by Dr. Osama M. Khaled — published May 23, 2026 — last modified May 23, 2026 05:02 AM — filed under: Year 7, Year 8
    Even/Odd Numbers, Factors, Prime Numbers, HCF, and LCM
    Located in Mathematics / Calculus / From Arithmetic to Algebra
  10. Read Circle Graphs
    by Dr. Osama M. Khaled — published May 25, 2026 — last modified May 25, 2026 09:51 PM — filed under: Year 8
    In a circle graph, regions called sectors are used to show what part of the whole each quantity represents.
    Located in Mathematics / Statistics / Reading Graphs and Tables
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