Proportions Video: https://www.youtube.com/watch?v=j-va9qeYyOI
Ratios and Rates Video Mathantics: https://www.youtube.com/watch?v=RQ2nYUBVvqI
Simple Interest Video: https://www.youtube.com/watch?v=6AZijeJDmgY
Similar Figures Video: https://www.youtube.com/watch?v=1UuiF3mskQA
Proportions Video Mathantics: https://www.youtube.com/watch?v=USmit5zUGas
Scale Factor Video: https://www.youtube.com/watch?v=XtkU4VkWh8I
Real-Life Scale Drawings/Models (Introductory): https://www.youtube.com/watch?v=IYizlhPvMWQ
What is a commission?: https://www.youtube.com/watch?v=Iq875LdH2BU
What are percentages? Video: https://www.youtube.com/watch?v=JeVSmq1Nrpw
Solve a proportion using cross products: https://www.youtube.com/watch?annotation_id=annotation_3213975775&feature=iv&src_vid=P_aQPxr2G_4&v=D5U14KjLB5I
Constant of proportionality from graph: https://www.youtube.com/watch?v=AIN5EaybYLw
Constant of proportionality from table (Khan): https://www.youtube.com/watch?v=qcz1Cm_-l50
Percent Equation Video: https://www.youtube.com/watch?v=fLI7OZIxDtg
Proportional & Non-proportional Relationships: https://www.youtube.com/watch?v=HwJPkXOboBk&t=3s
Constant of proportionality from tables & graphs: https://www.youtube.com/watch?v=J5h-aDzIOvU
Sales Tax and Discounts (What do they mean...) Practice Quiz: http://www.softschools.com/quizzes/math/sales_tax_and_discounts/quiz3231.html
Apply Percents Mini Quiz: http://www.mathsisfun.com/quiz/percenttest.html
Standards-based cumulative test: https://www.lumoslearning.com/llwp/resources/common-core-parcc-practice-tests-and-sample-questions/practice-test.html?TestMode=on&std_test%5B%5D=7.RP.A.1&std_test%5B%5D=7.RP.A.2.C&std_test%5B%5D=7.RP.A.3&type=Student&state=NC&questions=Yes&id=7659&cur=557&StdTest=Y
Unit Rate Leveled Questions: https://www.mathgames.com/skill/6.65-unit-rates