Tools & Resources
Curated extras for Topic 2: interactive tools, supplemental videos, and references. Pick what helps. Skip what doesn't.
Bookmarks for the pages you'll come back to across the topic.
Topic 2 Cheat Sheet
Percent conversions, unit-cancellation setup, and budgeting rules in one place. Bookmark for the DQs and MA1.
Topic 2 Glossary
Named terms — percent, ratio, dimensional analysis, fixed vs. variable cost — with a one-sentence definition and where they first show up in T2.
Getting Started with ALEKS
The setup guide for the ALEKS homework tool — worth a re-read if you're still gauging the pace or how the pie relates to your weekly ALEKS requirement.
Hands-on widgets for poking at the math. Drag a slider, watch the line move.
Percent Sandbox
Drag a slider to fill the 100-cell grid, then flip through three calculator modes: find the part, find the percent, find the whole.
Receipt Stacker
Drag the price, discount, and tax sliders. Watch a live receipt rebuild itself, then flip to the multiplier shortcut on one line.
Cancellation Sandbox
Drag conversion factors into multiplication slots and watch units cancel. Three difficulty modes, from one-step to multi-step chains.
Math Antics: What Are Percentages?
Walks through the literal "out of 100" meaning of percent using a 10×10 grid, then connects it to fractions and decimals. The plain-English on-ramp for this lesson, with no detour into interest or percent change.
How to Solve Percent Problems Using the Percent Equation
Explicitly drills all three percent shapes (find the part, find the percent, find the whole) back-to-back with calm, board-style worked examples. Lock in the three setups before a quiz.
Math Antics: Percents And Equivalent Fractions
Converts fractions to percents and back, including reducing to lowest terms (60% → 60/100 → 3/5). Same visual approach as the L1 Math Antics video, so the concept clicks even if the previous one didn't.
Converting percent to decimal and fraction
A tight Sal Khan walkthrough that moves between all three forms in one example, hitting both the decimal-shift trick and the fraction-reduction step. Different voice and shorter than Math Antics, so a good second pass.
Percent Word Problems: Sales Tax, Discount, & Finding the Original Price
Multiple worked dollar-and-cents examples: sales tax added on, discount taken off, and reverse-engineering original price from a sale price. Matches the lesson's $80-jacket-with-tax flavor exactly.
Tax, discount and tip examples
Sal works real-world tip and tax-and-discount problems, naturally arriving at the multiplier-shortcut intuition (paying 108% of the bill, paying 75% of the price). Different voice from OCT and shorter, good for one more pass before a quiz.
Unit conversions within the metric system
Sal Khan walks through metric-to-metric conversions step by step (kg → g → mg style). Same chain recipe from the lesson, applied to the metric system specifically. Pairs well with ALEKS Q3's multi-factor setup.
Convert Fahrenheit to Celsius
The temperature exception, walked through carefully. Same formulas as the lesson's pitfall callout, with extra examples. Useful prep for ALEKS Q6 (the Moscow temperature problem).
Budgeting Basics!
PBS-quality production with no app pitch and no investing detour: just a clear "list income, sort expenses, give every dollar a job" framing aimed at people setting up their first budget.
How do you build a budget?
Sal sets up an actual sample budget in a spreadsheet — income, fixed expenses, variable expenses, savings — and computes a savings rate as a percent of income, mirroring this lesson's $3,000 / 15% example almost note-for-note.